Finding the Third Proportional to 56,430 and 87,658.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,430 : 87,658.50 = 87,658.50 : x
2. Step 2: Convert to fraction form
   56,430/87,658.50 = 87,658.50/x
3. Step 3: Cross multiply
   56,430x = 87,658.50 × 87,658.50
4. Step 4: Simplify right side
   56,430x = 7,684,012,622.25
5. Step 5: Solve for x
   x = 7,684,012,622.25/56,430
6. Step 6: Final answer
   x = 136,168.93