Finding the Fourth Proportional to 2,981.76, 4,472.68 and 901.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.76 : 4,472.68 = 901.78 : x
2. Step 2: Convert to fraction form
   2,981.76/4,472.68 = 901.78/x
3. Step 3: Cross multiply
   2,981.76x = 4,472.68 × 901.78
4. Step 4: Simplify right side
   2,981.76x = 4,033,373.37
5. Step 5: Solve for x
   x = 4,033,373.37/2,981.76
6. Step 6: Final answer
   x = 1,352.68