Finding the Fourth Proportional to 12,386.18, 17,088.72 and 7,077.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.18 : 17,088.72 = 7,077.26 : x
2. Step 2: Convert to fraction form
   12,386.18/17,088.72 = 7,077.26/x
3. Step 3: Cross multiply
   12,386.18x = 17,088.72 × 7,077.26
4. Step 4: Simplify right side
   12,386.18x = 120,941,314.51
5. Step 5: Solve for x
   x = 120,941,314.51/12,386.18
6. Step 6: Final answer
   x = 9,764.21