Finding the Fourth Proportional to 638,081.46, 880,570.89 and 351,620.01

Step by Step Solution

1. Step 1: Write the proportion equation
   638,081.46 : 880,570.89 = 351,620.01 : x
2. Step 2: Convert to fraction form
   638,081.46/880,570.89 = 351,620.01/x
3. Step 3: Cross multiply
   638,081.46x = 880,570.89 × 351,620.01
4. Step 4: Simplify right side
   638,081.46x = 309,626,345,147.51
5. Step 5: Solve for x
   x = 309,626,345,147.51/638,081.46
6. Step 6: Final answer
   x = 485,245.79