Finding the Fourth Proportional to 1,990.08, 2,981.52 and 1,013.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.08 : 2,981.52 = 1,013.76 : x
2. Step 2: Convert to fraction form
   1,990.08/2,981.52 = 1,013.76/x
3. Step 3: Cross multiply
   1,990.08x = 2,981.52 × 1,013.76
4. Step 4: Simplify right side
   1,990.08x = 3,022,545.72
5. Step 5: Solve for x
   x = 3,022,545.72/1,990.08
6. Step 6: Final answer
   x = 1,518.81