Finding the Fourth Proportional to 99,140.83, 136,814.42 and 53,818.81

Step by Step Solution

1. Step 1: Write the proportion equation
   99,140.83 : 136,814.42 = 53,818.81 : x
2. Step 2: Convert to fraction form
   99,140.83/136,814.42 = 53,818.81/x
3. Step 3: Cross multiply
   99,140.83x = 136,814.42 × 53,818.81
4. Step 4: Simplify right side
   99,140.83x = 7,363,189,067.75
5. Step 5: Solve for x
   x = 7,363,189,067.75/99,140.83
6. Step 6: Final answer
   x = 74,270.00