Finding the Fourth Proportional to 1,152.63, 1,590.18 and 648.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.63 : 1,590.18 = 648.37 : x
2. Step 2: Convert to fraction form
   1,152.63/1,590.18 = 648.37/x
3. Step 3: Cross multiply
   1,152.63x = 1,590.18 × 648.37
4. Step 4: Simplify right side
   1,152.63x = 1,031,025.01
5. Step 5: Solve for x
   x = 1,031,025.01/1,152.63
6. Step 6: Final answer
   x = 894.50