Finding the Fourth Proportional to 9,069.91, 12,518.25 and 5,090.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,069.91 : 12,518.25 = 5,090.78 : x
2. Step 2: Convert to fraction form
   9,069.91/12,518.25 = 5,090.78/x
3. Step 3: Cross multiply
   9,069.91x = 12,518.25 × 5,090.78
4. Step 4: Simplify right side
   9,069.91x = 63,727,668.94
5. Step 5: Solve for x
   x = 63,727,668.94/9,069.91
6. Step 6: Final answer
   x = 7,026.28