Finding the Fourth Proportional to 1,746.72, 2,623.68 and 1,688.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,746.72 : 2,623.68 = 1,688.40 : x
2. Step 2: Convert to fraction form
   1,746.72/2,623.68 = 1,688.40/x
3. Step 3: Cross multiply
   1,746.72x = 2,623.68 × 1,688.40
4. Step 4: Simplify right side
   1,746.72x = 4,429,821.31
5. Step 5: Solve for x
   x = 4,429,821.31/1,746.72
6. Step 6: Final answer
   x = 2,536.08