Finding the Fourth Proportional to 389,626.89, 537,679.83 and 217,547.52

Step by Step Solution

1. Step 1: Write the proportion equation
   389,626.89 : 537,679.83 = 217,547.52 : x
2. Step 2: Convert to fraction form
   389,626.89/537,679.83 = 217,547.52/x
3. Step 3: Cross multiply
   389,626.89x = 537,679.83 × 217,547.52
4. Step 4: Simplify right side
   389,626.89x = 116,970,913,570.52
5. Step 5: Solve for x
   x = 116,970,913,570.52/389,626.89
6. Step 6: Final answer
   x = 300,212.63