Finding the Fourth Proportional to 99,429.94, 137,213.34 and 54,717.94

Step by Step Solution

1. Step 1: Write the proportion equation
   99,429.94 : 137,213.34 = 54,717.94 : x
2. Step 2: Convert to fraction form
   99,429.94/137,213.34 = 54,717.94/x
3. Step 3: Cross multiply
   99,429.94x = 137,213.34 × 54,717.94
4. Step 4: Simplify right side
   99,429.94x = 7,508,031,305.32
5. Step 5: Solve for x
   x = 7,508,031,305.32/99,429.94
6. Step 6: Final answer
   x = 75,510.77