Finding the Fourth Proportional to 42,840.76, 64,250.79 and 16,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,840.76 : 64,250.79 = 16,528.72 : x
2. Step 2: Convert to fraction form
   42,840.76/64,250.79 = 16,528.72/x
3. Step 3: Cross multiply
   42,840.76x = 64,250.79 × 16,528.72
4. Step 4: Simplify right side
   42,840.76x = 1,061,983,317.69
5. Step 5: Solve for x
   x = 1,061,983,317.69/42,840.76
6. Step 6: Final answer
   x = 24,789.09