Finding the Fourth Proportional to 604,075.05, 906,404.18 and 426,199.05

Step by Step Solution

1. Step 1: Write the proportion equation
   604,075.05 : 906,404.18 = 426,199.05 : x
2. Step 2: Convert to fraction form
   604,075.05/906,404.18 = 426,199.05/x
3. Step 3: Cross multiply
   604,075.05x = 906,404.18 × 426,199.05
4. Step 4: Simplify right side
   604,075.05x = 386,308,598,301.03
5. Step 5: Solve for x
   x = 386,308,598,301.03/604,075.05
6. Step 6: Final answer
   x = 639,504.31