Finding the Fourth Proportional to 2,380.29, 3,570.22 and 648.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.29 : 3,570.22 = 648.91 : x
2. Step 2: Convert to fraction form
   2,380.29/3,570.22 = 648.91/x
3. Step 3: Cross multiply
   2,380.29x = 3,570.22 × 648.91
4. Step 4: Simplify right side
   2,380.29x = 2,316,751.46
5. Step 5: Solve for x
   x = 2,316,751.46/2,380.29
6. Step 6: Final answer
   x = 973.31