Finding the Fourth Proportional to 13,902.76, 19,180.92 and 7,930.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,902.76 : 19,180.92 = 7,930.12 : x
2. Step 2: Convert to fraction form
   13,902.76/19,180.92 = 7,930.12/x
3. Step 3: Cross multiply
   13,902.76x = 19,180.92 × 7,930.12
4. Step 4: Simplify right side
   13,902.76x = 152,106,997.31
5. Step 5: Solve for x
   x = 152,106,997.31/13,902.76
6. Step 6: Final answer
   x = 10,940.78