Finding the Fourth Proportional to 77,916.48, 116,895.84 and 65,406.72

Step by Step Solution

1. Step 1: Write the proportion equation
   77,916.48 : 116,895.84 = 65,406.72 : x
2. Step 2: Convert to fraction form
   77,916.48/116,895.84 = 65,406.72/x
3. Step 3: Cross multiply
   77,916.48x = 116,895.84 × 65,406.72
4. Step 4: Simplify right side
   77,916.48x = 7,645,773,476.04
5. Step 5: Solve for x
   x = 7,645,773,476.04/77,916.48
6. Step 6: Final answer
   x = 98,127.81