Finding the Fourth Proportional to 9,042.89, 12,478.90 and 5,009.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.89 : 12,478.90 = 5,009.55 : x
2. Step 2: Convert to fraction form
   9,042.89/12,478.90 = 5,009.55/x
3. Step 3: Cross multiply
   9,042.89x = 12,478.90 × 5,009.55
4. Step 4: Simplify right side
   9,042.89x = 62,513,648.45
5. Step 5: Solve for x
   x = 62,513,648.45/9,042.89
6. Step 6: Final answer
   x = 6,913.02