Finding the Fourth Proportional to 42,978.99, 64,431.81 and 16,310.07

Step by Step Solution

1. Step 1: Write the proportion equation
   42,978.99 : 64,431.81 = 16,310.07 : x
2. Step 2: Convert to fraction form
   42,978.99/64,431.81 = 16,310.07/x
3. Step 3: Cross multiply
   42,978.99x = 64,431.81 × 16,310.07
4. Step 4: Simplify right side
   42,978.99x = 1,050,887,331.33
5. Step 5: Solve for x
   x = 1,050,887,331.33/42,978.99
6. Step 6: Final answer
   x = 24,451.19