Finding the Fourth Proportional to 2,376.56, 3,279.86 and 1,381.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,376.56 : 3,279.86 = 1,381.78 : x
2. Step 2: Convert to fraction form
   2,376.56/3,279.86 = 1,381.78/x
3. Step 3: Cross multiply
   2,376.56x = 3,279.86 × 1,381.78
4. Step 4: Simplify right side
   2,376.56x = 4,532,044.95
5. Step 5: Solve for x
   x = 4,532,044.95/2,376.56
6. Step 6: Final answer
   x = 1,906.98