Finding the Fourth Proportional to 1,381.78, 1,907.00 and 792.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.78 : 1,907.00 = 792.50 : x
2. Step 2: Convert to fraction form
   1,381.78/1,907.00 = 792.50/x
3. Step 3: Cross multiply
   1,381.78x = 1,907.00 × 792.50
4. Step 4: Simplify right side
   1,381.78x = 1,511,304.25
5. Step 5: Solve for x
   x = 1,511,304.25/1,381.78
6. Step 6: Final answer
   x = 1,093.74