Finding the Fourth Proportional to 143,401.10, 215,048.19 and 42,172.05

Step by Step Solution

1. Step 1: Write the proportion equation
   143,401.10 : 215,048.19 = 42,172.05 : x
2. Step 2: Convert to fraction form
   143,401.10/215,048.19 = 42,172.05/x
3. Step 3: Cross multiply
   143,401.10x = 215,048.19 × 42,172.05
4. Step 4: Simplify right side
   143,401.10x = 9,069,023,985.67
5. Step 5: Solve for x
   x = 9,069,023,985.67/143,401.10
6. Step 6: Final answer
   x = 63,242.36