Finding the Fourth Proportional to 99,342.24, 137,111.76 and 56,929.20

Step by Step Solution

1. Step 1: Write the proportion equation
   99,342.24 : 137,111.76 = 56,929.20 : x
2. Step 2: Convert to fraction form
   99,342.24/137,111.76 = 56,929.20/x
3. Step 3: Cross multiply
   99,342.24x = 137,111.76 × 56,929.20
4. Step 4: Simplify right side
   99,342.24x = 7,805,662,807.39
5. Step 5: Solve for x
   x = 7,805,662,807.39/99,342.24
6. Step 6: Final answer
   x = 78,573.45