Finding the Fourth Proportional to 1,372.53, 1,893.59 and 782.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.53 : 1,893.59 = 782.72 : x
2. Step 2: Convert to fraction form
   1,372.53/1,893.59 = 782.72/x
3. Step 3: Cross multiply
   1,372.53x = 1,893.59 × 782.72
4. Step 4: Simplify right side
   1,372.53x = 1,482,137.38
5. Step 5: Solve for x
   x = 1,482,137.38/1,372.53
6. Step 6: Final answer
   x = 1,079.86