Finding the Fourth Proportional to 17,886.29, 26,780.18 and 9,078.12

Step by Step Solution

1. Step 1: Write the proportion equation
   17,886.29 : 26,780.18 = 9,078.12 : x
2. Step 2: Convert to fraction form
   17,886.29/26,780.18 = 9,078.12/x
3. Step 3: Cross multiply
   17,886.29x = 26,780.18 × 9,078.12
4. Step 4: Simplify right side
   17,886.29x = 243,113,642.27
5. Step 5: Solve for x
   x = 243,113,642.27/17,886.29
6. Step 6: Final answer
   x = 13,592.18