Finding the Fourth Proportional to 139,838.28, 209,570.58 and 51,008.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,838.28 : 209,570.58 = 51,008.28 : x
2. Step 2: Convert to fraction form
   139,838.28/209,570.58 = 51,008.28/x
3. Step 3: Cross multiply
   139,838.28x = 209,570.58 × 51,008.28
4. Step 4: Simplify right side
   139,838.28x = 10,689,834,824.40
5. Step 5: Solve for x
   x = 10,689,834,824.40/139,838.28
6. Step 6: Final answer
   x = 76,444.27