Finding the Fourth Proportional to 1,382.50, 1,907.88 and 761.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.50 : 1,907.88 = 761.50 : x
2. Step 2: Convert to fraction form
   1,382.50/1,907.88 = 761.50/x
3. Step 3: Cross multiply
   1,382.50x = 1,907.88 × 761.50
4. Step 4: Simplify right side
   1,382.50x = 1,452,850.62
5. Step 5: Solve for x
   x = 1,452,850.62/1,382.50
6. Step 6: Final answer
   x = 1,050.89