Finding the Fourth Proportional to 99,029.91, 136,658.72 and 56,588.45

Step by Step Solution

1. Step 1: Write the proportion equation
   99,029.91 : 136,658.72 = 56,588.45 : x
2. Step 2: Convert to fraction form
   99,029.91/136,658.72 = 56,588.45/x
3. Step 3: Cross multiply
   99,029.91x = 136,658.72 × 56,588.45
4. Step 4: Simplify right side
   99,029.91x = 7,733,304,177.55
5. Step 5: Solve for x
   x = 7,733,304,177.55/99,029.91
6. Step 6: Final answer
   x = 78,090.59