Finding the Fourth Proportional to 12,111.78, 16,703.16 and 7,858.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.78 : 16,703.16 = 7,858.41 : x
2. Step 2: Convert to fraction form
   12,111.78/16,703.16 = 7,858.41/x
3. Step 3: Cross multiply
   12,111.78x = 16,703.16 × 7,858.41
4. Step 4: Simplify right side
   12,111.78x = 131,260,279.58
5. Step 5: Solve for x
   x = 131,260,279.58/12,111.78
6. Step 6: Final answer
   x = 10,837.41