Finding the Fourth Proportional to 99,429.32, 137,212.48 and 54,717.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,429.32 : 137,212.48 = 54,717.32 : x
2. Step 2: Convert to fraction form
   99,429.32/137,212.48 = 54,717.32/x
3. Step 3: Cross multiply
   99,429.32x = 137,212.48 × 54,717.32
4. Step 4: Simplify right side
   99,429.32x = 7,507,899,176.15
5. Step 5: Solve for x
   x = 7,507,899,176.15/99,429.32
6. Step 6: Final answer
   x = 75,509.91