Finding the Fourth Proportional to 11,746.64, 17,620.80 and 3,426.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,746.64 : 17,620.80 = 3,426.72 : x
2. Step 2: Convert to fraction form
   11,746.64/17,620.80 = 3,426.72/x
3. Step 3: Cross multiply
   11,746.64x = 17,620.80 × 3,426.72
4. Step 4: Simplify right side
   11,746.64x = 60,381,547.78
5. Step 5: Solve for x
   x = 60,381,547.78/11,746.64
6. Step 6: Final answer
   x = 5,140.33