Finding the Fourth Proportional to 111,143.76, 153,379.61 and 63,399.93

Step by Step Solution

1. Step 1: Write the proportion equation
   111,143.76 : 153,379.61 = 63,399.93 : x
2. Step 2: Convert to fraction form
   111,143.76/153,379.61 = 63,399.93/x
3. Step 3: Cross multiply
   111,143.76x = 153,379.61 × 63,399.93
4. Step 4: Simplify right side
   111,143.76x = 9,724,256,537.43
5. Step 5: Solve for x
   x = 9,724,256,537.43/111,143.76
6. Step 6: Final answer
   x = 87,492.60