Finding the Third Proportional to 61,470.50 and 91,812

Step by Step Solution

1. Step 1: Write the proportion equation
   61,470.50 : 91,812 = 91,812 : x
2. Step 2: Convert to fraction form
   61,470.50/91,812 = 91,812/x
3. Step 3: Cross multiply
   61,470.50x = 91,812 × 91,812
4. Step 4: Simplify right side
   61,470.50x = 8,429,443,344
5. Step 5: Solve for x
   x = 8,429,443,344/61,470.50
6. Step 6: Final answer
   x = 137,129.90