Finding the Fourth Proportional to 2,380.10, 3,570.16 and 648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.10 : 3,570.16 = 648.72 : x
2. Step 2: Convert to fraction form
   2,380.10/3,570.16 = 648.72/x
3. Step 3: Cross multiply
   2,380.10x = 3,570.16 × 648.72
4. Step 4: Simplify right side
   2,380.10x = 2,316,034.20
5. Step 5: Solve for x
   x = 2,316,034.20/2,380.10
6. Step 6: Final answer
   x = 973.08