Finding the Fourth Proportional to 1,948.39, 2,688.72 and 1,064.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,948.39 : 2,688.72 = 1,064.20 : x
2. Step 2: Convert to fraction form
   1,948.39/2,688.72 = 1,064.20/x
3. Step 3: Cross multiply
   1,948.39x = 2,688.72 × 1,064.20
4. Step 4: Simplify right side
   1,948.39x = 2,861,335.82
5. Step 5: Solve for x
   x = 2,861,335.82/1,948.39
6. Step 6: Final answer
   x = 1,468.56