Finding the Fourth Proportional to 542,466.72, 813,607.20 and 143,111.61

Step by Step Solution

1. Step 1: Write the proportion equation
   542,466.72 : 813,607.20 = 143,111.61 : x
2. Step 2: Convert to fraction form
   542,466.72/813,607.20 = 143,111.61/x
3. Step 3: Cross multiply
   542,466.72x = 813,607.20 × 143,111.61
4. Step 4: Simplify right side
   542,466.72x = 116,436,636,299.59
5. Step 5: Solve for x
   x = 116,436,636,299.59/542,466.72
6. Step 6: Final answer
   x = 214,642.91