Finding the Fourth Proportional to 17,760.72, 26,647.38 and 7,899.12

Step by Step Solution

1. Step 1: Write the proportion equation
   17,760.72 : 26,647.38 = 7,899.12 : x
2. Step 2: Convert to fraction form
   17,760.72/26,647.38 = 7,899.12/x
3. Step 3: Cross multiply
   17,760.72x = 26,647.38 × 7,899.12
4. Step 4: Simplify right side
   17,760.72x = 210,490,852.31
5. Step 5: Solve for x
   x = 210,490,852.31/17,760.72
6. Step 6: Final answer
   x = 11,851.48