Finding the Fourth Proportional to 1,688.76, 2,530.71 and 713.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.76 : 2,530.71 = 713.52 : x
2. Step 2: Convert to fraction form
   1,688.76/2,530.71 = 713.52/x
3. Step 3: Cross multiply
   1,688.76x = 2,530.71 × 713.52
4. Step 4: Simplify right side
   1,688.76x = 1,805,712.20
5. Step 5: Solve for x
   x = 1,805,712.20/1,688.76
6. Step 6: Final answer
   x = 1,069.25