Finding the Fourth Proportional to 111,387.37, 153,722.71 and 63,639.69

Step by Step Solution

1. Step 1: Write the proportion equation
   111,387.37 : 153,722.71 = 63,639.69 : x
2. Step 2: Convert to fraction form
   111,387.37/153,722.71 = 63,639.69/x
3. Step 3: Cross multiply
   111,387.37x = 153,722.71 × 63,639.69
4. Step 4: Simplify right side
   111,387.37x = 9,782,864,841.75
5. Step 5: Solve for x
   x = 9,782,864,841.75/111,387.37
6. Step 6: Final answer
   x = 87,827.42