Finding the Fourth Proportional to 2,770.88, 4,156.52 and 921.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,770.88 : 4,156.52 = 921.96 : x
2. Step 2: Convert to fraction form
   2,770.88/4,156.52 = 921.96/x
3. Step 3: Cross multiply
   2,770.88x = 4,156.52 × 921.96
4. Step 4: Simplify right side
   2,770.88x = 3,832,140.57
5. Step 5: Solve for x
   x = 3,832,140.57/2,770.88
6. Step 6: Final answer
   x = 1,383.01