Finding the Fourth Proportional to 51,786.48, 71,437.32 and 42,780.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,786.48 : 71,437.32 = 42,780.72 : x
2. Step 2: Convert to fraction form
   51,786.48/71,437.32 = 42,780.72/x
3. Step 3: Cross multiply
   51,786.48x = 71,437.32 × 42,780.72
4. Step 4: Simplify right side
   51,786.48x = 3,056,139,984.47
5. Step 5: Solve for x
   x = 3,056,139,984.47/51,786.48
6. Step 6: Final answer
   x = 59,014.24