Finding the Fourth Proportional to 2,011.92, 3,018.60 and 916.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.92 : 3,018.60 = 916.32 : x
2. Step 2: Convert to fraction form
   2,011.92/3,018.60 = 916.32/x
3. Step 3: Cross multiply
   2,011.92x = 3,018.60 × 916.32
4. Step 4: Simplify right side
   2,011.92x = 2,766,003.55
5. Step 5: Solve for x
   x = 2,766,003.55/2,011.92
6. Step 6: Final answer
   x = 1,374.81