Finding the Fourth Proportional to 1,456.47, 2,181.20 and 907.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.47 : 2,181.20 = 907.02 : x
2. Step 2: Convert to fraction form
   1,456.47/2,181.20 = 907.02/x
3. Step 3: Cross multiply
   1,456.47x = 2,181.20 × 907.02
4. Step 4: Simplify right side
   1,456.47x = 1,978,387.49
5. Step 5: Solve for x
   x = 1,978,387.49/1,456.47
6. Step 6: Final answer
   x = 1,358.34