Finding the Fourth Proportional to 1,796.28, 2,478.89 and 988.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,796.28 : 2,478.89 = 988.76 : x
2. Step 2: Convert to fraction form
   1,796.28/2,478.89 = 988.76/x
3. Step 3: Cross multiply
   1,796.28x = 2,478.89 × 988.76
4. Step 4: Simplify right side
   1,796.28x = 2,451,035.95
5. Step 5: Solve for x
   x = 2,451,035.95/1,796.28
6. Step 6: Final answer
   x = 1,364.51