Finding the Fourth Proportional to 13,160.86, 18,162.22 and 7,192.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,160.86 : 18,162.22 = 7,192.78 : x
2. Step 2: Convert to fraction form
   13,160.86/18,162.22 = 7,192.78/x
3. Step 3: Cross multiply
   13,160.86x = 18,162.22 × 7,192.78
4. Step 4: Simplify right side
   13,160.86x = 130,636,852.77
5. Step 5: Solve for x
   x = 130,636,852.77/13,160.86
6. Step 6: Final answer
   x = 9,926.16