Finding the Fourth Proportional to 2,275.50, 3,138.98 and 1,528.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.50 : 3,138.98 = 1,528.17 : x
2. Step 2: Convert to fraction form
   2,275.50/3,138.98 = 1,528.17/x
3. Step 3: Cross multiply
   2,275.50x = 3,138.98 × 1,528.17
4. Step 4: Simplify right side
   2,275.50x = 4,796,887.43
5. Step 5: Solve for x
   x = 4,796,887.43/2,275.50
6. Step 6: Final answer
   x = 2,108.06