Finding the Fourth Proportional to 278,002.89, 383,639.82 and 157,139.93

Step by Step Solution

1. Step 1: Write the proportion equation
   278,002.89 : 383,639.82 = 157,139.93 : x
2. Step 2: Convert to fraction form
   278,002.89/383,639.82 = 157,139.93/x
3. Step 3: Cross multiply
   278,002.89x = 383,639.82 × 157,139.93
4. Step 4: Simplify right side
   278,002.89x = 60,285,132,541.81
5. Step 5: Solve for x
   x = 60,285,132,541.81/278,002.89
6. Step 6: Final answer
   x = 216,850.74