Finding the Fourth Proportional to 68,055.24, 101,978.91 and 28,590.78

Step by Step Solution

1. Step 1: Write the proportion equation
   68,055.24 : 101,978.91 = 28,590.78 : x
2. Step 2: Convert to fraction form
   68,055.24/101,978.91 = 28,590.78/x
3. Step 3: Cross multiply
   68,055.24x = 101,978.91 × 28,590.78
4. Step 4: Simplify right side
   68,055.24x = 2,915,656,580.45
5. Step 5: Solve for x
   x = 2,915,656,580.45/68,055.24
6. Step 6: Final answer
   x = 42,842.50