Finding the Fourth Proportional to 607,196.16, 837,918.72 and 338,918.40

Step by Step Solution

1. Step 1: Write the proportion equation
   607,196.16 : 837,918.72 = 338,918.40 : x
2. Step 2: Convert to fraction form
   607,196.16/837,918.72 = 338,918.40/x
3. Step 3: Cross multiply
   607,196.16x = 837,918.72 × 338,918.40
4. Step 4: Simplify right side
   607,196.16x = 283,986,071,912.45
5. Step 5: Solve for x
   x = 283,986,071,912.45/607,196.16
6. Step 6: Final answer
   x = 467,700.70