Finding the Fourth Proportional to 114,139.80, 170,384.85 and 100,143

Step by Step Solution

1. Step 1: Write the proportion equation
   114,139.80 : 170,384.85 = 100,143 : x
2. Step 2: Convert to fraction form
   114,139.80/170,384.85 = 100,143/x
3. Step 3: Cross multiply
   114,139.80x = 170,384.85 × 100,143
4. Step 4: Simplify right side
   114,139.80x = 17,062,850,033.55
5. Step 5: Solve for x
   x = 17,062,850,033.55/114,139.80
6. Step 6: Final answer
   x = 149,490.80