Finding the Fourth Proportional to 77,665.27, 116,322.88 and 54,395.59

Step by Step Solution

1. Step 1: Write the proportion equation
   77,665.27 : 116,322.88 = 54,395.59 : x
2. Step 2: Convert to fraction form
   77,665.27/116,322.88 = 54,395.59/x
3. Step 3: Cross multiply
   77,665.27x = 116,322.88 × 54,395.59
4. Step 4: Simplify right side
   77,665.27x = 6,327,451,688.10
5. Step 5: Solve for x
   x = 6,327,451,688.10/77,665.27
6. Step 6: Final answer
   x = 81,470.80