Finding the Fourth Proportional to 372,139.83, 558,059.49 and 144,315.50

Step by Step Solution

1. Step 1: Write the proportion equation
   372,139.83 : 558,059.49 = 144,315.50 : x
2. Step 2: Convert to fraction form
   372,139.83/558,059.49 = 144,315.50/x
3. Step 3: Cross multiply
   372,139.83x = 558,059.49 × 144,315.50
4. Step 4: Simplify right side
   372,139.83x = 80,536,631,538.80
5. Step 5: Solve for x
   x = 80,536,631,538.80/372,139.83
6. Step 6: Final answer
   x = 216,414.97