Finding the Fourth Proportional to 143,234.42, 214,501.71 and 123,638.90

Step by Step Solution

1. Step 1: Write the proportion equation
   143,234.42 : 214,501.71 = 123,638.90 : x
2. Step 2: Convert to fraction form
   143,234.42/214,501.71 = 123,638.90/x
3. Step 3: Cross multiply
   143,234.42x = 214,501.71 × 123,638.90
4. Step 4: Simplify right side
   143,234.42x = 26,520,755,472.52
5. Step 5: Solve for x
   x = 26,520,755,472.52/143,234.42
6. Step 6: Final answer
   x = 185,156.30