Finding the Fourth Proportional to 51,256.55, 70,671.20 and 42,150.09

Step by Step Solution

1. Step 1: Write the proportion equation
   51,256.55 : 70,671.20 = 42,150.09 : x
2. Step 2: Convert to fraction form
   51,256.55/70,671.20 = 42,150.09/x
3. Step 3: Cross multiply
   51,256.55x = 70,671.20 × 42,150.09
4. Step 4: Simplify right side
   51,256.55x = 2,978,797,440.41
5. Step 5: Solve for x
   x = 2,978,797,440.41/51,256.55
6. Step 6: Final answer
   x = 58,115.45