Finding the Fourth Proportional to 1,688.51, 2,330.37 and 1,025.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.51 : 2,330.37 = 1,025.53 : x
2. Step 2: Convert to fraction form
   1,688.51/2,330.37 = 1,025.53/x
3. Step 3: Cross multiply
   1,688.51x = 2,330.37 × 1,025.53
4. Step 4: Simplify right side
   1,688.51x = 2,389,858.52
5. Step 5: Solve for x
   x = 2,389,858.52/1,688.51
6. Step 6: Final answer
   x = 1,415.36