Finding the Third Proportional to 51,901.75 and 77,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,901.75 : 77,581.50 = 77,581.50 : x
2. Step 2: Convert to fraction form
   51,901.75/77,581.50 = 77,581.50/x
3. Step 3: Cross multiply
   51,901.75x = 77,581.50 × 77,581.50
4. Step 4: Simplify right side
   51,901.75x = 6,018,889,142.25
5. Step 5: Solve for x
   x = 6,018,889,142.25/51,901.75
6. Step 6: Final answer
   x = 115,966.98