Finding the Fourth Proportional to 1,047.12, 1,444.98 and 581.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.12 : 1,444.98 = 581.40 : x
2. Step 2: Convert to fraction form
   1,047.12/1,444.98 = 581.40/x
3. Step 3: Cross multiply
   1,047.12x = 1,444.98 × 581.40
4. Step 4: Simplify right side
   1,047.12x = 840,111.37
5. Step 5: Solve for x
   x = 840,111.37/1,047.12
6. Step 6: Final answer
   x = 802.31