Finding the Fourth Proportional to 13,902.15, 19,180.20 and 7,929.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,902.15 : 19,180.20 = 7,929.52 : x
2. Step 2: Convert to fraction form
   13,902.15/19,180.20 = 7,929.52/x
3. Step 3: Cross multiply
   13,902.15x = 19,180.20 × 7,929.52
4. Step 4: Simplify right side
   13,902.15x = 152,089,779.50
5. Step 5: Solve for x
   x = 152,089,779.50/13,902.15
6. Step 6: Final answer
   x = 10,940.02