Finding the Fourth Proportional to 171,139.74, 256,743.83 and 52,806.63

Step by Step Solution

1. Step 1: Write the proportion equation
   171,139.74 : 256,743.83 = 52,806.63 : x
2. Step 2: Convert to fraction form
   171,139.74/256,743.83 = 52,806.63/x
3. Step 3: Cross multiply
   171,139.74x = 256,743.83 × 52,806.63
4. Step 4: Simplify right side
   171,139.74x = 13,557,776,435.59
5. Step 5: Solve for x
   x = 13,557,776,435.59/171,139.74
6. Step 6: Final answer
   x = 79,220.50