Finding the Fourth Proportional to 99,429.94, 137,182.38 and 56,402.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,429.94 : 137,182.38 = 56,402.32 : x
2. Step 2: Convert to fraction form
   99,429.94/137,182.38 = 56,402.32/x
3. Step 3: Cross multiply
   99,429.94x = 137,182.38 × 56,402.32
4. Step 4: Simplify right side
   99,429.94x = 7,737,404,495.12
5. Step 5: Solve for x
   x = 7,737,404,495.12/99,429.94
6. Step 6: Final answer
   x = 77,817.65