Finding the Fourth Proportional to 5,100.42, 7,650.78 and 1,590.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,100.42 : 7,650.78 = 1,590.55 : x
2. Step 2: Convert to fraction form
   5,100.42/7,650.78 = 1,590.55/x
3. Step 3: Cross multiply
   5,100.42x = 7,650.78 × 1,590.55
4. Step 4: Simplify right side
   5,100.42x = 12,168,948.13
5. Step 5: Solve for x
   x = 12,168,948.13/5,100.42
6. Step 6: Final answer
   x = 2,385.87