Finding the Fourth Proportional to 30,763.72, 42,456.90 and 19,585

Step by Step Solution

1. Step 1: Write the proportion equation
   30,763.72 : 42,456.90 = 19,585 : x
2. Step 2: Convert to fraction form
   30,763.72/42,456.90 = 19,585/x
3. Step 3: Cross multiply
   30,763.72x = 42,456.90 × 19,585
4. Step 4: Simplify right side
   30,763.72x = 831,518,386.50
5. Step 5: Solve for x
   x = 831,518,386.50/30,763.72
6. Step 6: Final answer
   x = 27,029.19