Finding the Fourth Proportional to 13,020.53, 17,970.12 and 7,983.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,020.53 : 17,970.12 = 7,983.86 : x
2. Step 2: Convert to fraction form
   13,020.53/17,970.12 = 7,983.86/x
3. Step 3: Cross multiply
   13,020.53x = 17,970.12 × 7,983.86
4. Step 4: Simplify right side
   13,020.53x = 143,470,882.34
5. Step 5: Solve for x
   x = 143,470,882.34/13,020.53
6. Step 6: Final answer
   x = 11,018.82