Finding the Fourth Proportional to 1,688.62, 2,520.72 and 1,458.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.62 : 2,520.72 = 1,458.99 : x
2. Step 2: Convert to fraction form
   1,688.62/2,520.72 = 1,458.99/x
3. Step 3: Cross multiply
   1,688.62x = 2,520.72 × 1,458.99
4. Step 4: Simplify right side
   1,688.62x = 3,677,705.27
5. Step 5: Solve for x
   x = 3,677,705.27/1,688.62
6. Step 6: Final answer
   x = 2,177.94