Finding the Fourth Proportional to 99,123.72, 136,792.78 and 56,103.22

Step by Step Solution

1. Step 1: Write the proportion equation
   99,123.72 : 136,792.78 = 56,103.22 : x
2. Step 2: Convert to fraction form
   99,123.72/136,792.78 = 56,103.22/x
3. Step 3: Cross multiply
   99,123.72x = 136,792.78 × 56,103.22
4. Step 4: Simplify right side
   99,123.72x = 7,674,515,430.75
5. Step 5: Solve for x
   x = 7,674,515,430.75/99,123.72
6. Step 6: Final answer
   x = 77,423.60