Finding the Fourth Proportional to 1,372.02, 1,893.38 and 782.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.02 : 1,893.38 = 782.55 : x
2. Step 2: Convert to fraction form
   1,372.02/1,893.38 = 782.55/x
3. Step 3: Cross multiply
   1,372.02x = 1,893.38 × 782.55
4. Step 4: Simplify right side
   1,372.02x = 1,481,664.52
5. Step 5: Solve for x
   x = 1,481,664.52/1,372.02
6. Step 6: Final answer
   x = 1,079.91