Finding the Fourth Proportional to 217,603.86, 300,216.34 and 142,196.10

Step by Step Solution

1. Step 1: Write the proportion equation
   217,603.86 : 300,216.34 = 142,196.10 : x
2. Step 2: Convert to fraction form
   217,603.86/300,216.34 = 142,196.10/x
3. Step 3: Cross multiply
   217,603.86x = 300,216.34 × 142,196.10
4. Step 4: Simplify right side
   217,603.86x = 42,689,592,704.27
5. Step 5: Solve for x
   x = 42,689,592,704.27/217,603.86
6. Step 6: Final answer
   x = 196,180.31