Finding the Fourth Proportional to 99,120.71, 136,786.71 and 53,798.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99,120.71 : 136,786.71 = 53,798.69 : x
2. Step 2: Convert to fraction form
   99,120.71/136,786.71 = 53,798.69/x
3. Step 3: Cross multiply
   99,120.71x = 136,786.71 × 53,798.69
4. Step 4: Simplify right side
   99,120.71x = 7,358,945,807.41
5. Step 5: Solve for x
   x = 7,358,945,807.41/99,120.71
6. Step 6: Final answer
   x = 74,242.26