Finding the Fourth Proportional to 745,131.16, 1,117,022.78 and 271,705.80

Step by Step Solution

1. Step 1: Write the proportion equation
   745,131.16 : 1,117,022.78 = 271,705.80 : x
2. Step 2: Convert to fraction form
   745,131.16/1,117,022.78 = 271,705.80/x
3. Step 3: Cross multiply
   745,131.16x = 1,117,022.78 × 271,705.80
4. Step 4: Simplify right side
   745,131.16x = 303,501,568,058.12
5. Step 5: Solve for x
   x = 303,501,568,058.12/745,131.16
6. Step 6: Final answer
   x = 407,312.95