Finding the Fourth Proportional to 91,513.68, 137,066.40 and 77,516.88

Step by Step Solution

1. Step 1: Write the proportion equation
   91,513.68 : 137,066.40 = 77,516.88 : x
2. Step 2: Convert to fraction form
   91,513.68/137,066.40 = 77,516.88/x
3. Step 3: Cross multiply
   91,513.68x = 137,066.40 × 77,516.88
4. Step 4: Simplify right side
   91,513.68x = 10,624,959,680.83
5. Step 5: Solve for x
   x = 10,624,959,680.83/91,513.68
6. Step 6: Final answer
   x = 116,102.42