Finding the Fourth Proportional to 99,527.84, 137,361.68 and 57,090.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,527.84 : 137,361.68 = 57,090.72 : x
2. Step 2: Convert to fraction form
   99,527.84/137,361.68 = 57,090.72/x
3. Step 3: Cross multiply
   99,527.84x = 137,361.68 × 57,090.72
4. Step 4: Simplify right side
   99,527.84x = 7,842,077,211.61
5. Step 5: Solve for x
   x = 7,842,077,211.61/99,527.84
6. Step 6: Final answer
   x = 78,792.80