Finding the Fourth Proportional to 171,247.52, 256,978.20 and 123,221

Step by Step Solution

1. Step 1: Write the proportion equation
   171,247.52 : 256,978.20 = 123,221 : x
2. Step 2: Convert to fraction form
   171,247.52/256,978.20 = 123,221/x
3. Step 3: Cross multiply
   171,247.52x = 256,978.20 × 123,221
4. Step 4: Simplify right side
   171,247.52x = 31,665,110,782.20
5. Step 5: Solve for x
   x = 31,665,110,782.20/171,247.52
6. Step 6: Final answer
   x = 184,908.43