Finding the Fourth Proportional to 1,642.02, 2,265.82 and 1,012.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.02 : 2,265.82 = 1,012.45 : x
2. Step 2: Convert to fraction form
   1,642.02/2,265.82 = 1,012.45/x
3. Step 3: Cross multiply
   1,642.02x = 2,265.82 × 1,012.45
4. Step 4: Simplify right side
   1,642.02x = 2,294,029.46
5. Step 5: Solve for x
   x = 2,294,029.46/1,642.02
6. Step 6: Final answer
   x = 1,397.08