Finding the Fourth Proportional to 99,120.58, 136,788.89 and 53,800.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,120.58 : 136,788.89 = 53,800.47 : x
2. Step 2: Convert to fraction form
   99,120.58/136,788.89 = 53,800.47/x
3. Step 3: Cross multiply
   99,120.58x = 136,788.89 × 53,800.47
4. Step 4: Simplify right side
   99,120.58x = 7,359,306,303.78
5. Step 5: Solve for x
   x = 7,359,306,303.78/99,120.58
6. Step 6: Final answer
   x = 74,246.00