Finding the Fourth Proportional to 2,278.32, 3,417.52 and 891.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.32 : 3,417.52 = 891.60 : x
2. Step 2: Convert to fraction form
   2,278.32/3,417.52 = 891.60/x
3. Step 3: Cross multiply
   2,278.32x = 3,417.52 × 891.60
4. Step 4: Simplify right side
   2,278.32x = 3,047,060.83
5. Step 5: Solve for x
   x = 3,047,060.83/2,278.32
6. Step 6: Final answer
   x = 1,337.42