Finding the Fourth Proportional to 2,566.43, 3,541.67 and 1,387.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,566.43 : 3,541.67 = 1,387.50 : x
2. Step 2: Convert to fraction form
   2,566.43/3,541.67 = 1,387.50/x
3. Step 3: Cross multiply
   2,566.43x = 3,541.67 × 1,387.50
4. Step 4: Simplify right side
   2,566.43x = 4,914,052.11
5. Step 5: Solve for x
   x = 4,914,052.11/2,566.43
6. Step 6: Final answer
   x = 1,914.74