Finding the Fourth Proportional to 99,147.34, 136,840.81 and 56,129.29

Step by Step Solution

1. Step 1: Write the proportion equation
   99,147.34 : 136,840.81 = 56,129.29 : x
2. Step 2: Convert to fraction form
   99,147.34/136,840.81 = 56,129.29/x
3. Step 3: Cross multiply
   99,147.34x = 136,840.81 × 56,129.29
4. Step 4: Simplify right side
   99,147.34x = 7,680,777,508.32
5. Step 5: Solve for x
   x = 7,680,777,508.32/99,147.34
6. Step 6: Final answer
   x = 77,468.32