Finding the Fourth Proportional to 13,180.86, 18,188.82 and 7,875.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,180.86 : 18,188.82 = 7,875.63 : x
2. Step 2: Convert to fraction form
   13,180.86/18,188.82 = 7,875.63/x
3. Step 3: Cross multiply
   13,180.86x = 18,188.82 × 7,875.63
4. Step 4: Simplify right side
   13,180.86x = 143,248,416.46
5. Step 5: Solve for x
   x = 143,248,416.46/13,180.86
6. Step 6: Final answer
   x = 10,867.91