Finding the Fourth Proportional to 12,369.78, 17,070.55 and 7,066.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,369.78 : 17,070.55 = 7,066.31 : x
2. Step 2: Convert to fraction form
   12,369.78/17,070.55 = 7,066.31/x
3. Step 3: Cross multiply
   12,369.78x = 17,070.55 × 7,066.31
4. Step 4: Simplify right side
   12,369.78x = 120,625,695.15
5. Step 5: Solve for x
   x = 120,625,695.15/12,369.78
6. Step 6: Final answer
   x = 9,751.64