Finding the Fourth Proportional to 791,131.20, 1,091,766.27 and 428,555.05

Step by Step Solution

1. Step 1: Write the proportion equation
   791,131.20 : 1,091,766.27 = 428,555.05 : x
2. Step 2: Convert to fraction form
   791,131.20/1,091,766.27 = 428,555.05/x
3. Step 3: Cross multiply
   791,131.20x = 1,091,766.27 × 428,555.05
4. Step 4: Simplify right side
   791,131.20x = 467,881,942,969.33
5. Step 5: Solve for x
   x = 467,881,942,969.33/791,131.20
6. Step 6: Final answer
   x = 591,408.79