Finding the Fourth Proportional to 20,569.92, 30,848.52 and 7,420.59

Step by Step Solution

1. Step 1: Write the proportion equation
   20,569.92 : 30,848.52 = 7,420.59 : x
2. Step 2: Convert to fraction form
   20,569.92/30,848.52 = 7,420.59/x
3. Step 3: Cross multiply
   20,569.92x = 30,848.52 × 7,420.59
4. Step 4: Simplify right side
   20,569.92x = 228,914,219.03
5. Step 5: Solve for x
   x = 228,914,219.03/20,569.92
6. Step 6: Final answer
   x = 11,128.59