Finding the Fourth Proportional to 1,397.20, 2,094.72 and 472.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.20 : 2,094.72 = 472.18 : x
2. Step 2: Convert to fraction form
   1,397.20/2,094.72 = 472.18/x
3. Step 3: Cross multiply
   1,397.20x = 2,094.72 × 472.18
4. Step 4: Simplify right side
   1,397.20x = 989,084.89
5. Step 5: Solve for x
   x = 989,084.89/1,397.20
6. Step 6: Final answer
   x = 707.91