Finding the Fourth Proportional to 6,225.78, 8,590.86 and 3,707.39

Step by Step Solution

1. Step 1: Write the proportion equation
   6,225.78 : 8,590.86 = 3,707.39 : x
2. Step 2: Convert to fraction form
   6,225.78/8,590.86 = 3,707.39/x
3. Step 3: Cross multiply
   6,225.78x = 8,590.86 × 3,707.39
4. Step 4: Simplify right side
   6,225.78x = 31,849,641.61
5. Step 5: Solve for x
   x = 31,849,641.61/6,225.78
6. Step 6: Final answer
   x = 5,115.77