Finding the Fourth Proportional to 171,523.50, 257,373 and 81,667.86

Step by Step Solution

1. Step 1: Write the proportion equation
   171,523.50 : 257,373 = 81,667.86 : x
2. Step 2: Convert to fraction form
   171,523.50/257,373 = 81,667.86/x
3. Step 3: Cross multiply
   171,523.50x = 257,373 × 81,667.86
4. Step 4: Simplify right side
   171,523.50x = 21,019,102,131.78
5. Step 5: Solve for x
   x = 21,019,102,131.78/171,523.50
6. Step 6: Final answer
   x = 122,543.57