Finding the Fourth Proportional to 17,978.57, 26,980.01 and 6,291.89

Step by Step Solution

1. Step 1: Write the proportion equation
   17,978.57 : 26,980.01 = 6,291.89 : x
2. Step 2: Convert to fraction form
   17,978.57/26,980.01 = 6,291.89/x
3. Step 3: Cross multiply
   17,978.57x = 26,980.01 × 6,291.89
4. Step 4: Simplify right side
   17,978.57x = 169,755,255.12
5. Step 5: Solve for x
   x = 169,755,255.12/17,978.57
6. Step 6: Final answer
   x = 9,442.09