Finding the Fourth Proportional to 9,123.64, 12,590.61 and 4,931.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.64 : 12,590.61 = 4,931.89 : x
2. Step 2: Convert to fraction form
   9,123.64/12,590.61 = 4,931.89/x
3. Step 3: Cross multiply
   9,123.64x = 12,590.61 × 4,931.89
4. Step 4: Simplify right side
   9,123.64x = 62,095,453.58
5. Step 5: Solve for x
   x = 62,095,453.58/9,123.64
6. Step 6: Final answer
   x = 6,806.00