Finding the Fourth Proportional to 418,839.83, 623,522.57 and 416,348.72

Step by Step Solution

1. Step 1: Write the proportion equation
   418,839.83 : 623,522.57 = 416,348.72 : x
2. Step 2: Convert to fraction form
   418,839.83/623,522.57 = 416,348.72/x
3. Step 3: Cross multiply
   418,839.83x = 623,522.57 × 416,348.72
4. Step 4: Simplify right side
   418,839.83x = 259,602,823,910.61
5. Step 5: Solve for x
   x = 259,602,823,910.61/418,839.83
6. Step 6: Final answer
   x = 619,814.08