Finding the Fourth Proportional to 30,650.57, 42,285.53 and 19,317.05

Step by Step Solution

1. Step 1: Write the proportion equation
   30,650.57 : 42,285.53 = 19,317.05 : x
2. Step 2: Convert to fraction form
   30,650.57/42,285.53 = 19,317.05/x
3. Step 3: Cross multiply
   30,650.57x = 42,285.53 × 19,317.05
4. Step 4: Simplify right side
   30,650.57x = 816,831,697.29
5. Step 5: Solve for x
   x = 816,831,697.29/30,650.57
6. Step 6: Final answer
   x = 26,649.80