Finding the Third Proportional to 56,657 and 87,422

Step by Step Solution

1. Step 1: Write the proportion equation
   56,657 : 87,422 = 87,422 : x
2. Step 2: Convert to fraction form
   56,657/87,422 = 87,422/x
3. Step 3: Cross multiply
   56,657x = 87,422 × 87,422
4. Step 4: Simplify right side
   56,657x = 7,642,606,084
5. Step 5: Solve for x
   x = 7,642,606,084/56,657
6. Step 6: Final answer
   x = 134,892.53