Finding the Fourth Proportional to 1,061.58, 1,590.34 and 649.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.58 : 1,590.34 = 649.49 : x
2. Step 2: Convert to fraction form
   1,061.58/1,590.34 = 649.49/x
3. Step 3: Cross multiply
   1,061.58x = 1,590.34 × 649.49
4. Step 4: Simplify right side
   1,061.58x = 1,032,909.93
5. Step 5: Solve for x
   x = 1,032,909.93/1,061.58
6. Step 6: Final answer
   x = 972.99