Finding the Fourth Proportional to 1,688.72, 2,329.32 and 1,068.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.72 : 2,329.32 = 1,068.56 : x
2. Step 2: Convert to fraction form
   1,688.72/2,329.32 = 1,068.56/x
3. Step 3: Cross multiply
   1,688.72x = 2,329.32 × 1,068.56
4. Step 4: Simplify right side
   1,688.72x = 2,489,018.18
5. Step 5: Solve for x
   x = 2,489,018.18/1,688.72
6. Step 6: Final answer
   x = 1,473.91