Finding the Fourth Proportional to 99,429.42, 137,181.70 and 56,401.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99,429.42 : 137,181.70 = 56,401.82 : x
2. Step 2: Convert to fraction form
   99,429.42/137,181.70 = 56,401.82/x
3. Step 3: Cross multiply
   99,429.42x = 137,181.70 × 56,401.82
4. Step 4: Simplify right side
   99,429.42x = 7,737,297,550.69
5. Step 5: Solve for x
   x = 7,737,297,550.69/99,429.42
6. Step 6: Final answer
   x = 77,816.98