Finding the Fourth Proportional to 2,930.58, 4,395.06 and 981.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,930.58 : 4,395.06 = 981.72 : x
2. Step 2: Convert to fraction form
   2,930.58/4,395.06 = 981.72/x
3. Step 3: Cross multiply
   2,930.58x = 4,395.06 × 981.72
4. Step 4: Simplify right side
   2,930.58x = 4,314,718.30
5. Step 5: Solve for x
   x = 4,314,718.30/2,930.58
6. Step 6: Final answer
   x = 1,472.31