Finding the Fourth Proportional to 1,432.95, 1,974.78 and 990.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.95 : 1,974.78 = 990.06 : x
2. Step 2: Convert to fraction form
   1,432.95/1,974.78 = 990.06/x
3. Step 3: Cross multiply
   1,432.95x = 1,974.78 × 990.06
4. Step 4: Simplify right side
   1,432.95x = 1,955,150.69
5. Step 5: Solve for x
   x = 1,955,150.69/1,432.95
6. Step 6: Final answer
   x = 1,364.42