Finding the Fourth Proportional to 13,098.78, 19,648.37 and 7,292.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,098.78 : 19,648.37 = 7,292.30 : x
2. Step 2: Convert to fraction form
   13,098.78/19,648.37 = 7,292.30/x
3. Step 3: Cross multiply
   13,098.78x = 19,648.37 × 7,292.30
4. Step 4: Simplify right side
   13,098.78x = 143,281,728.54
5. Step 5: Solve for x
   x = 143,281,728.54/13,098.78
6. Step 6: Final answer
   x = 10,938.56