Finding the Fourth Proportional to 13,019.72, 17,970.13 and 8,474.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.72 : 17,970.13 = 8,474.34 : x
2. Step 2: Convert to fraction form
   13,019.72/17,970.13 = 8,474.34/x
3. Step 3: Cross multiply
   13,019.72x = 17,970.13 × 8,474.34
4. Step 4: Simplify right side
   13,019.72x = 152,284,880.43
5. Step 5: Solve for x
   x = 152,284,880.43/13,019.72
6. Step 6: Final answer
   x = 11,696.48