Finding the Fourth Proportional to 5,213.32, 7,820.03 and 1,317.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,213.32 : 7,820.03 = 1,317.72 : x
2. Step 2: Convert to fraction form
   5,213.32/7,820.03 = 1,317.72/x
3. Step 3: Cross multiply
   5,213.32x = 7,820.03 × 1,317.72
4. Step 4: Simplify right side
   5,213.32x = 10,304,609.93
5. Step 5: Solve for x
   x = 10,304,609.93/5,213.32
6. Step 6: Final answer
   x = 1,976.59