Finding the Fourth Proportional to 42,099.48, 63,131.94 and 15,790.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,099.48 : 63,131.94 = 15,790.68 : x
2. Step 2: Convert to fraction form
   42,099.48/63,131.94 = 15,790.68/x
3. Step 3: Cross multiply
   42,099.48x = 63,131.94 × 15,790.68
4. Step 4: Simplify right side
   42,099.48x = 996,896,262.32
5. Step 5: Solve for x
   x = 996,896,262.32/42,099.48
6. Step 6: Final answer
   x = 23,679.54