Finding the Fourth Proportional to 99,041.58, 136,686.72 and 56,591.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,041.58 : 136,686.72 = 56,591.88 : x
2. Step 2: Convert to fraction form
   99,041.58/136,686.72 = 56,591.88/x
3. Step 3: Cross multiply
   99,041.58x = 136,686.72 × 56,591.88
4. Step 4: Simplify right side
   99,041.58x = 7,735,358,455.83
5. Step 5: Solve for x
   x = 7,735,358,455.83/99,041.58
6. Step 6: Final answer
   x = 78,102.13