Finding the Fourth Proportional to 9,054.59, 12,490.61 and 5,691.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,054.59 : 12,490.61 = 5,691.06 : x
2. Step 2: Convert to fraction form
   9,054.59/12,490.61 = 5,691.06/x
3. Step 3: Cross multiply
   9,054.59x = 12,490.61 × 5,691.06
4. Step 4: Simplify right side
   9,054.59x = 71,084,782.49
5. Step 5: Solve for x
   x = 71,084,782.49/9,054.59
6. Step 6: Final answer
   x = 7,850.69