Finding the Fourth Proportional to 392,298.50, 588,535.23 and 142,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,298.50 : 588,535.23 = 142,980.50 : x
2. Step 2: Convert to fraction form
   392,298.50/588,535.23 = 142,980.50/x
3. Step 3: Cross multiply
   392,298.50x = 588,535.23 × 142,980.50
4. Step 4: Simplify right side
   392,298.50x = 84,149,061,453.02
5. Step 5: Solve for x
   x = 84,149,061,453.02/392,298.50
6. Step 6: Final answer
   x = 214,502.63