Finding the Fourth Proportional to 99,039.48, 136,672.34 and 56,013.27

Step by Step Solution

1. Step 1: Write the proportion equation
   99,039.48 : 136,672.34 = 56,013.27 : x
2. Step 2: Convert to fraction form
   99,039.48/136,672.34 = 56,013.27/x
3. Step 3: Cross multiply
   99,039.48x = 136,672.34 × 56,013.27
4. Step 4: Simplify right side
   99,039.48x = 7,655,464,401.89
5. Step 5: Solve for x
   x = 7,655,464,401.89/99,039.48
6. Step 6: Final answer
   x = 77,297.10