Finding the Fourth Proportional to 1,335.32, 1,845.30 and 1,072.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.32 : 1,845.30 = 1,072.88 : x
2. Step 2: Convert to fraction form
   1,335.32/1,845.30 = 1,072.88/x
3. Step 3: Cross multiply
   1,335.32x = 1,845.30 × 1,072.88
4. Step 4: Simplify right side
   1,335.32x = 1,979,785.46
5. Step 5: Solve for x
   x = 1,979,785.46/1,335.32
6. Step 6: Final answer
   x = 1,482.63