Finding the Fourth Proportional to 99,811.50, 137,739.87 and 55,099.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99,811.50 : 137,739.87 = 55,099.82 : x
2. Step 2: Convert to fraction form
   99,811.50/137,739.87 = 55,099.82/x
3. Step 3: Cross multiply
   99,811.50x = 137,739.87 × 55,099.82
4. Step 4: Simplify right side
   99,811.50x = 7,589,442,043.82
5. Step 5: Solve for x
   x = 7,589,442,043.82/99,811.50
6. Step 6: Final answer
   x = 76,037.75