Finding the Fourth Proportional to 687,443.01, 948,239.83 and 407,842.25

Step by Step Solution

1. Step 1: Write the proportion equation
   687,443.01 : 948,239.83 = 407,842.25 : x
2. Step 2: Convert to fraction form
   687,443.01/948,239.83 = 407,842.25/x
3. Step 3: Cross multiply
   687,443.01x = 948,239.83 × 407,842.25
4. Step 4: Simplify right side
   687,443.01x = 386,732,265,806.82
5. Step 5: Solve for x
   x = 386,732,265,806.82/687,443.01
6. Step 6: Final answer
   x = 562,566.29