Finding the Fourth Proportional to 172,168.10, 237,620.18 and 143,442.21

Step by Step Solution

1. Step 1: Write the proportion equation
   172,168.10 : 237,620.18 = 143,442.21 : x
2. Step 2: Convert to fraction form
   172,168.10/237,620.18 = 143,442.21/x
3. Step 3: Cross multiply
   172,168.10x = 237,620.18 × 143,442.21
4. Step 4: Simplify right side
   172,168.10x = 34,084,763,042.59
5. Step 5: Solve for x
   x = 34,084,763,042.59/172,168.10
6. Step 6: Final answer
   x = 197,973.75