Finding the Fourth Proportional to 42,789.48, 64,183.98 and 11,624.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,789.48 : 64,183.98 = 11,624.72 : x
2. Step 2: Convert to fraction form
   42,789.48/64,183.98 = 11,624.72/x
3. Step 3: Cross multiply
   42,789.48x = 64,183.98 × 11,624.72
4. Step 4: Simplify right side
   42,789.48x = 746,120,795.99
5. Step 5: Solve for x
   x = 746,120,795.99/42,789.48
6. Step 6: Final answer
   x = 17,437.01