Finding the Fourth Proportional to 716,870.16, 989,272.98 and 394,573.32

Step by Step Solution

1. Step 1: Write the proportion equation
   716,870.16 : 989,272.98 = 394,573.32 : x
2. Step 2: Convert to fraction form
   716,870.16/989,272.98 = 394,573.32/x
3. Step 3: Cross multiply
   716,870.16x = 989,272.98 × 394,573.32
4. Step 4: Simplify right side
   716,870.16x = 390,340,724,104.89
5. Step 5: Solve for x
   x = 390,340,724,104.89/716,870.16
6. Step 6: Final answer
   x = 544,506.87