Finding the Fourth Proportional to 171,042.78, 256,606.01 and 120,540.34

Step by Step Solution

1. Step 1: Write the proportion equation
   171,042.78 : 256,606.01 = 120,540.34 : x
2. Step 2: Convert to fraction form
   171,042.78/256,606.01 = 120,540.34/x
3. Step 3: Cross multiply
   171,042.78x = 256,606.01 × 120,540.34
4. Step 4: Simplify right side
   171,042.78x = 30,931,375,691.44
5. Step 5: Solve for x
   x = 30,931,375,691.44/171,042.78
6. Step 6: Final answer
   x = 180,840.00