Finding the Fourth Proportional to 526,054.72, 789,280.72 and 315,839.20

Step by Step Solution

1. Step 1: Write the proportion equation
   526,054.72 : 789,280.72 = 315,839.20 : x
2. Step 2: Convert to fraction form
   526,054.72/789,280.72 = 315,839.20/x
3. Step 3: Cross multiply
   526,054.72x = 789,280.72 × 315,839.20
4. Step 4: Simplify right side
   526,054.72x = 249,285,791,180.22
5. Step 5: Solve for x
   x = 249,285,791,180.22/526,054.72
6. Step 6: Final answer
   x = 473,878.06