Finding the Fourth Proportional to 278,585.31, 384,471.53 and 157,747.89

Step by Step Solution

1. Step 1: Write the proportion equation
   278,585.31 : 384,471.53 = 157,747.89 : x
2. Step 2: Convert to fraction form
   278,585.31/384,471.53 = 157,747.89/x
3. Step 3: Cross multiply
   278,585.31x = 384,471.53 × 157,747.89
4. Step 4: Simplify right side
   278,585.31x = 60,649,571,833.83
5. Step 5: Solve for x
   x = 60,649,571,833.83/278,585.31
6. Step 6: Final answer
   x = 217,705.56