Finding the Fourth Proportional to 10,755.60, 16,111.80 and 7,256.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,755.60 : 16,111.80 = 7,256.40 : x
2. Step 2: Convert to fraction form
   10,755.60/16,111.80 = 7,256.40/x
3. Step 3: Cross multiply
   10,755.60x = 16,111.80 × 7,256.40
4. Step 4: Simplify right side
   10,755.60x = 116,913,665.52
5. Step 5: Solve for x
   x = 116,913,665.52/10,755.60
6. Step 6: Final answer
   x = 10,870.03