Finding the Fourth Proportional to 217,604.86, 300,217.72 and 142,197.10

Step by Step Solution

1. Step 1: Write the proportion equation
   217,604.86 : 300,217.72 = 142,197.10 : x
2. Step 2: Convert to fraction form
   217,604.86/300,217.72 = 142,197.10/x
3. Step 3: Cross multiply
   217,604.86x = 300,217.72 × 142,197.10
4. Step 4: Simplify right side
   217,604.86x = 42,690,089,152.61
5. Step 5: Solve for x
   x = 42,690,089,152.61/217,604.86
6. Step 6: Final answer
   x = 196,181.69