Finding the Fourth Proportional to 542,118.31, 813,217.41 and 142,756.31

Step by Step Solution

1. Step 1: Write the proportion equation
   542,118.31 : 813,217.41 = 142,756.31 : x
2. Step 2: Convert to fraction form
   542,118.31/813,217.41 = 142,756.31/x
3. Step 3: Cross multiply
   542,118.31x = 813,217.41 × 142,756.31
4. Step 4: Simplify right side
   542,118.31x = 116,091,918,712.40
5. Step 5: Solve for x
   x = 116,091,918,712.40/542,118.31
6. Step 6: Final answer
   x = 214,144.99