Finding the Fourth Proportional to 9,123.25, 12,590.10 and 4,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.25 : 12,590.10 = 4,931.50 : x
2. Step 2: Convert to fraction form
   9,123.25/12,590.10 = 4,931.50/x
3. Step 3: Cross multiply
   9,123.25x = 12,590.10 × 4,931.50
4. Step 4: Simplify right side
   9,123.25x = 62,088,078.15
5. Step 5: Solve for x
   x = 62,088,078.15/9,123.25
6. Step 6: Final answer
   x = 6,805.48