Finding the Fourth Proportional to 1,938.57, 2,675.52 and 1,276.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,938.57 : 2,675.52 = 1,276.78 : x
2. Step 2: Convert to fraction form
   1,938.57/2,675.52 = 1,276.78/x
3. Step 3: Cross multiply
   1,938.57x = 2,675.52 × 1,276.78
4. Step 4: Simplify right side
   1,938.57x = 3,416,050.43
5. Step 5: Solve for x
   x = 3,416,050.43/1,938.57
6. Step 6: Final answer
   x = 1,762.15