Finding the Fourth Proportional to 17,656.29, 26,495.60 and 9,870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   17,656.29 : 26,495.60 = 9,870.21 : x
2. Step 2: Convert to fraction form
   17,656.29/26,495.60 = 9,870.21/x
3. Step 3: Cross multiply
   17,656.29x = 26,495.60 × 9,870.21
4. Step 4: Simplify right side
   17,656.29x = 261,517,086.72
5. Step 5: Solve for x
   x = 261,517,086.72/17,656.29
6. Step 6: Final answer
   x = 14,811.55