Finding the Fourth Proportional to 20,570.18, 30,835.83 and 7,419.02

Step by Step Solution

1. Step 1: Write the proportion equation
   20,570.18 : 30,835.83 = 7,419.02 : x
2. Step 2: Convert to fraction form
   20,570.18/30,835.83 = 7,419.02/x
3. Step 3: Cross multiply
   20,570.18x = 30,835.83 × 7,419.02
4. Step 4: Simplify right side
   20,570.18x = 228,771,639.49
5. Step 5: Solve for x
   x = 228,771,639.49/20,570.18
6. Step 6: Final answer
   x = 11,121.52