Finding the Fourth Proportional to 938,091.78, 1,407,123.83 and 298,434.26

Step by Step Solution

1. Step 1: Write the proportion equation
   938,091.78 : 1,407,123.83 = 298,434.26 : x
2. Step 2: Convert to fraction form
   938,091.78/1,407,123.83 = 298,434.26/x
3. Step 3: Cross multiply
   938,091.78x = 1,407,123.83 × 298,434.26
4. Step 4: Simplify right side
   938,091.78x = 419,933,960,590.04
5. Step 5: Solve for x
   x = 419,933,960,590.04/938,091.78
6. Step 6: Final answer
   x = 447,646.99