Finding the Fourth Proportional to 99,339.52, 137,089.52 and 56,897.16

Step by Step Solution

1. Step 1: Write the proportion equation
   99,339.52 : 137,089.52 = 56,897.16 : x
2. Step 2: Convert to fraction form
   99,339.52/137,089.52 = 56,897.16/x
3. Step 3: Cross multiply
   99,339.52x = 137,089.52 × 56,897.16
4. Step 4: Simplify right side
   99,339.52x = 7,800,004,353.76
5. Step 5: Solve for x
   x = 7,800,004,353.76/99,339.52
6. Step 6: Final answer
   x = 78,518.64