Finding the Fourth Proportional to 9,123.30, 12,590.14 and 4,931.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.30 : 12,590.14 = 4,931.54 : x
2. Step 2: Convert to fraction form
   9,123.30/12,590.14 = 4,931.54/x
3. Step 3: Cross multiply
   9,123.30x = 12,590.14 × 4,931.54
4. Step 4: Simplify right side
   9,123.30x = 62,088,779.02
5. Step 5: Solve for x
   x = 62,088,779.02/9,123.30
6. Step 6: Final answer
   x = 6,805.52