Finding the Fourth Proportional to 1,436.32, 1,980.80 and 1,045.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.32 : 1,980.80 = 1,045.76 : x
2. Step 2: Convert to fraction form
   1,436.32/1,980.80 = 1,045.76/x
3. Step 3: Cross multiply
   1,436.32x = 1,980.80 × 1,045.76
4. Step 4: Simplify right side
   1,436.32x = 2,071,441.41
5. Step 5: Solve for x
   x = 2,071,441.41/1,436.32
6. Step 6: Final answer
   x = 1,442.19