Finding the Fourth Proportional to 1,339.43, 1,848.52 and 772.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.43 : 1,848.52 = 772.35 : x
2. Step 2: Convert to fraction form
   1,339.43/1,848.52 = 772.35/x
3. Step 3: Cross multiply
   1,339.43x = 1,848.52 × 772.35
4. Step 4: Simplify right side
   1,339.43x = 1,427,698.46
5. Step 5: Solve for x
   x = 1,427,698.46/1,339.43
6. Step 6: Final answer
   x = 1,065.90