Finding the Fourth Proportional to 9,123.36, 12,590.22 and 4,931.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.36 : 12,590.22 = 4,931.61 : x
2. Step 2: Convert to fraction form
   9,123.36/12,590.22 = 4,931.61/x
3. Step 3: Cross multiply
   9,123.36x = 12,590.22 × 4,931.61
4. Step 4: Simplify right side
   9,123.36x = 62,090,054.85
5. Step 5: Solve for x
   x = 62,090,054.85/9,123.36
6. Step 6: Final answer
   x = 6,805.61