Finding the Fourth Proportional to 42,891.59, 64,345.47 and 16,245.55

Step by Step Solution

1. Step 1: Write the proportion equation
   42,891.59 : 64,345.47 = 16,245.55 : x
2. Step 2: Convert to fraction form
   42,891.59/64,345.47 = 16,245.55/x
3. Step 3: Cross multiply
   42,891.59x = 64,345.47 × 16,245.55
4. Step 4: Simplify right side
   42,891.59x = 1,045,327,842.02
5. Step 5: Solve for x
   x = 1,045,327,842.02/42,891.59
6. Step 6: Final answer
   x = 24,371.40