Finding the Fourth Proportional to 9,069.86, 12,515.72 and 5,090.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,069.86 : 12,515.72 = 5,090.21 : x
2. Step 2: Convert to fraction form
   9,069.86/12,515.72 = 5,090.21/x
3. Step 3: Cross multiply
   9,069.86x = 12,515.72 × 5,090.21
4. Step 4: Simplify right side
   9,069.86x = 63,707,580.52
5. Step 5: Solve for x
   x = 63,707,580.52/9,069.86
6. Step 6: Final answer
   x = 7,024.10