Finding the Fourth Proportional to 2,917.71, 4,377.38 and 1,620.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,917.71 : 4,377.38 = 1,620.09 : x
2. Step 2: Convert to fraction form
   2,917.71/4,377.38 = 1,620.09/x
3. Step 3: Cross multiply
   2,917.71x = 4,377.38 × 1,620.09
4. Step 4: Simplify right side
   2,917.71x = 7,091,741.46
5. Step 5: Solve for x
   x = 7,091,741.46/2,917.71
6. Step 6: Final answer
   x = 2,430.58