Finding the Fourth Proportional to 10,343.98, 15,518.70 and 5,412.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,343.98 : 15,518.70 = 5,412.30 : x
2. Step 2: Convert to fraction form
   10,343.98/15,518.70 = 5,412.30/x
3. Step 3: Cross multiply
   10,343.98x = 15,518.70 × 5,412.30
4. Step 4: Simplify right side
   10,343.98x = 83,991,860.01
5. Step 5: Solve for x
   x = 83,991,860.01/10,343.98
6. Step 6: Final answer
   x = 8,119.88