Finding the Fourth Proportional to 13,111.77, 18,093.62 and 7,445.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.77 : 18,093.62 = 7,445.78 : x
2. Step 2: Convert to fraction form
   13,111.77/18,093.62 = 7,445.78/x
3. Step 3: Cross multiply
   13,111.77x = 18,093.62 × 7,445.78
4. Step 4: Simplify right side
   13,111.77x = 134,721,113.92
5. Step 5: Solve for x
   x = 134,721,113.92/13,111.77
6. Step 6: Final answer
   x = 10,274.82