Finding the Fourth Proportional to 9,123.24, 12,590.10 and 4,931.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.24 : 12,590.10 = 4,931.49 : x
2. Step 2: Convert to fraction form
   9,123.24/12,590.10 = 4,931.49/x
3. Step 3: Cross multiply
   9,123.24x = 12,590.10 × 4,931.49
4. Step 4: Simplify right side
   9,123.24x = 62,087,952.25
5. Step 5: Solve for x
   x = 62,087,952.25/9,123.24
6. Step 6: Final answer
   x = 6,805.47