Finding the Fourth Proportional to 99,510.96, 137,320.53 and 54,188.76

Step by Step Solution

1. Step 1: Write the proportion equation
   99,510.96 : 137,320.53 = 54,188.76 : x
2. Step 2: Convert to fraction form
   99,510.96/137,320.53 = 54,188.76/x
3. Step 3: Cross multiply
   99,510.96x = 137,320.53 × 54,188.76
4. Step 4: Simplify right side
   99,510.96x = 7,441,229,243.24
5. Step 5: Solve for x
   x = 7,441,229,243.24/99,510.96
6. Step 6: Final answer
   x = 74,777.99