Finding the Fourth Proportional to 658,470, 908,727.48 and 371,982.72

Step by Step Solution

1. Step 1: Write the proportion equation
   658,470 : 908,727.48 = 371,982.72 : x
2. Step 2: Convert to fraction form
   658,470/908,727.48 = 371,982.72/x
3. Step 3: Cross multiply
   658,470x = 908,727.48 × 371,982.72
4. Step 4: Simplify right side
   658,470x = 338,030,919,749.15
5. Step 5: Solve for x
   x = 338,030,919,749.15/658,470
6. Step 6: Final answer
   x = 513,358.12