Finding the Fourth Proportional to 908,945.69, 1,254,288.71 and 501,026.45

Step by Step Solution

1. Step 1: Write the proportion equation
   908,945.69 : 1,254,288.71 = 501,026.45 : x
2. Step 2: Convert to fraction form
   908,945.69/1,254,288.71 = 501,026.45/x
3. Step 3: Cross multiply
   908,945.69x = 1,254,288.71 × 501,026.45
4. Step 4: Simplify right side
   908,945.69x = 628,431,819,646.38
5. Step 5: Solve for x
   x = 628,431,819,646.38/908,945.69
6. Step 6: Final answer
   x = 691,385.44