Finding the Fourth Proportional to 99,769.62, 137,676.52 and 56,743.29

Step by Step Solution

1. Step 1: Write the proportion equation
   99,769.62 : 137,676.52 = 56,743.29 : x
2. Step 2: Convert to fraction form
   99,769.62/137,676.52 = 56,743.29/x
3. Step 3: Cross multiply
   99,769.62x = 137,676.52 × 56,743.29
4. Step 4: Simplify right side
   99,769.62x = 7,812,218,700.55
5. Step 5: Solve for x
   x = 7,812,218,700.55/99,769.62
6. Step 6: Final answer
   x = 78,302.58