Finding the Fourth Proportional to 99,527.94, 137,350.28 and 56,506.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,527.94 : 137,350.28 = 56,506.31 : x
2. Step 2: Convert to fraction form
   99,527.94/137,350.28 = 56,506.31/x
3. Step 3: Cross multiply
   99,527.94x = 137,350.28 × 56,506.31
4. Step 4: Simplify right side
   99,527.94x = 7,761,157,469.84
5. Step 5: Solve for x
   x = 7,761,157,469.84/99,527.94
6. Step 6: Final answer
   x = 77,979.69