Finding the Third Proportional to 21,689,795,961 and 33,516,265,549.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,689,795,961 : 33,516,265,549.50 = 33,516,265,549.50 : x
2. Step 2: Convert to fraction form
   21,689,795,961/33,516,265,549.50 = 33,516,265,549.50/x
3. Step 3: Cross multiply
   21,689,795,961x = 33,516,265,549.50 × 33,516,265,549.50
4. Step 4: Simplify right side
   21,689,795,961x = 1,123,340,056,384,600,539,136
5. Step 5: Solve for x
   x = 1,123,340,056,384,600,539,136/21,689,795,961
6. Step 6: Final answer
   x = 51,791,176,754.47