Finding the Fourth Proportional to 11,865.59, 17,798.55 and 3,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,865.59 : 17,798.55 = 3,100.50 : x
2. Step 2: Convert to fraction form
   11,865.59/17,798.55 = 3,100.50/x
3. Step 3: Cross multiply
   11,865.59x = 17,798.55 × 3,100.50
4. Step 4: Simplify right side
   11,865.59x = 55,184,404.28
5. Step 5: Solve for x
   x = 55,184,404.28/11,865.59
6. Step 6: Final answer
   x = 4,650.79