Finding the Fourth Proportional to 11,876.18, 17,816.69 and 4,085.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,876.18 : 17,816.69 = 4,085.60 : x
2. Step 2: Convert to fraction form
   11,876.18/17,816.69 = 4,085.60/x
3. Step 3: Cross multiply
   11,876.18x = 17,816.69 × 4,085.60
4. Step 4: Simplify right side
   11,876.18x = 72,791,789.79
5. Step 5: Solve for x
   x = 72,791,789.79/11,876.18
6. Step 6: Final answer
   x = 6,129.23