Finding the Fourth Proportional to 760,196.68, 1,139,958.04 and 405,144.52

Step by Step Solution

1. Step 1: Write the proportion equation
   760,196.68 : 1,139,958.04 = 405,144.52 : x
2. Step 2: Convert to fraction form
   760,196.68/1,139,958.04 = 405,144.52/x
3. Step 3: Cross multiply
   760,196.68x = 1,139,958.04 × 405,144.52
4. Step 4: Simplify right side
   760,196.68x = 461,847,752,935.94
5. Step 5: Solve for x
   x = 461,847,752,935.94/760,196.68
6. Step 6: Final answer
   x = 607,537.19