Finding the Fourth Proportional to 1,061.60, 1,590.67 and 649.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.60 : 1,590.67 = 649.87 : x
2. Step 2: Convert to fraction form
   1,061.60/1,590.67 = 649.87/x
3. Step 3: Cross multiply
   1,061.60x = 1,590.67 × 649.87
4. Step 4: Simplify right side
   1,061.60x = 1,033,729.08
5. Step 5: Solve for x
   x = 1,033,729.08/1,061.60
6. Step 6: Final answer
   x = 973.75