Finding the Fourth Proportional to 99,089.32, 136,743.36 and 56,648.76

Step by Step Solution

1. Step 1: Write the proportion equation
   99,089.32 : 136,743.36 = 56,648.76 : x
2. Step 2: Convert to fraction form
   99,089.32/136,743.36 = 56,648.76/x
3. Step 3: Cross multiply
   99,089.32x = 136,743.36 × 56,648.76
4. Step 4: Simplify right side
   99,089.32x = 7,746,340,815.27
5. Step 5: Solve for x
   x = 7,746,340,815.27/99,089.32
6. Step 6: Final answer
   x = 78,175.34