Finding the Fourth Proportional to 1,342.27, 2,012.50 and 648.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.27 : 2,012.50 = 648.35 : x
2. Step 2: Convert to fraction form
   1,342.27/2,012.50 = 648.35/x
3. Step 3: Cross multiply
   1,342.27x = 2,012.50 × 648.35
4. Step 4: Simplify right side
   1,342.27x = 1,304,810.34
5. Step 5: Solve for x
   x = 1,304,810.34/1,342.27
6. Step 6: Final answer
   x = 972.09