Finding the Fourth Proportional to 2,101.51, 3,151.52 and 620.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.51 : 3,151.52 = 620.29 : x
2. Step 2: Convert to fraction form
   2,101.51/3,151.52 = 620.29/x
3. Step 3: Cross multiply
   2,101.51x = 3,151.52 × 620.29
4. Step 4: Simplify right side
   2,101.51x = 1,954,856.34
5. Step 5: Solve for x
   x = 1,954,856.34/2,101.51
6. Step 6: Final answer
   x = 930.22