Finding the Fourth Proportional to 1,488.15, 2,230.20 and 755.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.15 : 2,230.20 = 755.91 : x
2. Step 2: Convert to fraction form
   1,488.15/2,230.20 = 755.91/x
3. Step 3: Cross multiply
   1,488.15x = 2,230.20 × 755.91
4. Step 4: Simplify right side
   1,488.15x = 1,685,830.48
5. Step 5: Solve for x
   x = 1,685,830.48/1,488.15
6. Step 6: Final answer
   x = 1,132.84