Finding the Fourth Proportional to 278,978.88, 384,993.36 and 151,654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   278,978.88 : 384,993.36 = 151,654.72 : x
2. Step 2: Convert to fraction form
   278,978.88/384,993.36 = 151,654.72/x
3. Step 3: Cross multiply
   278,978.88x = 384,993.36 × 151,654.72
4. Step 4: Simplify right side
   278,978.88x = 58,386,060,212.66
5. Step 5: Solve for x
   x = 58,386,060,212.66/278,978.88
6. Step 6: Final answer
   x = 209,284.88