Finding the Fourth Proportional to 162,002.10, 243,003.15 and 142,319.10

Step by Step Solution

1. Step 1: Write the proportion equation
   162,002.10 : 243,003.15 = 142,319.10 : x
2. Step 2: Convert to fraction form
   162,002.10/243,003.15 = 142,319.10/x
3. Step 3: Cross multiply
   162,002.10x = 243,003.15 × 142,319.10
4. Step 4: Simplify right side
   162,002.10x = 34,583,989,605.17
5. Step 5: Solve for x
   x = 34,583,989,605.17/162,002.10
6. Step 6: Final answer
   x = 213,478.65