Finding the Fourth Proportional to 2,659.02, 3,990.91 and 1,487.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.02 : 3,990.91 = 1,487.31 : x
2. Step 2: Convert to fraction form
   2,659.02/3,990.91 = 1,487.31/x
3. Step 3: Cross multiply
   2,659.02x = 3,990.91 × 1,487.31
4. Step 4: Simplify right side
   2,659.02x = 5,935,720.35
5. Step 5: Solve for x
   x = 5,935,720.35/2,659.02
6. Step 6: Final answer
   x = 2,232.30