Finding the Fourth Proportional to 392,579.56, 589,024.86 and 143,436.52

Step by Step Solution

1. Step 1: Write the proportion equation
   392,579.56 : 589,024.86 = 143,436.52 : x
2. Step 2: Convert to fraction form
   392,579.56/589,024.86 = 143,436.52/x
3. Step 3: Cross multiply
   392,579.56x = 589,024.86 × 143,436.52
4. Step 4: Simplify right side
   392,579.56x = 84,487,676,111.89
5. Step 5: Solve for x
   x = 84,487,676,111.89/392,579.56
6. Step 6: Final answer
   x = 215,211.60