Finding the Fourth Proportional to 13,098.64, 18,070.78 and 8,061.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,098.64 : 18,070.78 = 8,061.34 : x
2. Step 2: Convert to fraction form
   13,098.64/18,070.78 = 8,061.34/x
3. Step 3: Cross multiply
   13,098.64x = 18,070.78 × 8,061.34
4. Step 4: Simplify right side
   13,098.64x = 145,674,570.98
5. Step 5: Solve for x
   x = 145,674,570.98/13,098.64
6. Step 6: Final answer
   x = 11,121.36