Finding the Fourth Proportional to 13,363.30, 20,061.15 and 13,266.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,363.30 : 20,061.15 = 13,266.10 : x
2. Step 2: Convert to fraction form
   13,363.30/20,061.15 = 13,266.10/x
3. Step 3: Cross multiply
   13,363.30x = 20,061.15 × 13,266.10
4. Step 4: Simplify right side
   13,363.30x = 266,133,222.02
5. Step 5: Solve for x
   x = 266,133,222.02/13,363.30
6. Step 6: Final answer
   x = 19,915.23