Finding the Fourth Proportional to 6,404.90, 8,838.42 and 3,572.57

Step by Step Solution

1. Step 1: Write the proportion equation
   6,404.90 : 8,838.42 = 3,572.57 : x
2. Step 2: Convert to fraction form
   6,404.90/8,838.42 = 3,572.57/x
3. Step 3: Cross multiply
   6,404.90x = 8,838.42 × 3,572.57
4. Step 4: Simplify right side
   6,404.90x = 31,575,829.95
5. Step 5: Solve for x
   x = 31,575,829.95/6,404.90
6. Step 6: Final answer
   x = 4,929.95