Finding the Fourth Proportional to 11,375.91, 17,056.58 and 7,856.06

Step by Step Solution

1. Step 1: Write the proportion equation
   11,375.91 : 17,056.58 = 7,856.06 : x
2. Step 2: Convert to fraction form
   11,375.91/17,056.58 = 7,856.06/x
3. Step 3: Cross multiply
   11,375.91x = 17,056.58 × 7,856.06
4. Step 4: Simplify right side
   11,375.91x = 133,997,391.31
5. Step 5: Solve for x
   x = 133,997,391.31/11,375.91
6. Step 6: Final answer
   x = 11,779.05