Finding the Third Proportional to 55,213 and 86,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,213 : 86,099.50 = 86,099.50 : x
2. Step 2: Convert to fraction form
   55,213/86,099.50 = 86,099.50/x
3. Step 3: Cross multiply
   55,213x = 86,099.50 × 86,099.50
4. Step 4: Simplify right side
   55,213x = 7,413,123,900.25
5. Step 5: Solve for x
   x = 7,413,123,900.25/55,213
6. Step 6: Final answer
   x = 134,264.10