Finding the Fourth Proportional to 1,507.31, 2,080.05 and 844.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.31 : 2,080.05 = 844.21 : x
2. Step 2: Convert to fraction form
   1,507.31/2,080.05 = 844.21/x
3. Step 3: Cross multiply
   1,507.31x = 2,080.05 × 844.21
4. Step 4: Simplify right side
   1,507.31x = 1,755,988.61
5. Step 5: Solve for x
   x = 1,755,988.61/1,507.31
6. Step 6: Final answer
   x = 1,164.98