Finding the Fourth Proportional to 13,902.72, 19,180.96 and 7,930.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,902.72 : 19,180.96 = 7,930.08 : x
2. Step 2: Convert to fraction form
   13,902.72/19,180.96 = 7,930.08/x
3. Step 3: Cross multiply
   13,902.72x = 19,180.96 × 7,930.08
4. Step 4: Simplify right side
   13,902.72x = 152,106,547.28
5. Step 5: Solve for x
   x = 152,106,547.28/13,902.72
6. Step 6: Final answer
   x = 10,940.78