Finding the Fourth Proportional to 42,709.56, 64,073.16 and 14,631.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,709.56 : 64,073.16 = 14,631.72 : x
2. Step 2: Convert to fraction form
   42,709.56/64,073.16 = 14,631.72/x
3. Step 3: Cross multiply
   42,709.56x = 64,073.16 × 14,631.72
4. Step 4: Simplify right side
   42,709.56x = 937,500,536.64
5. Step 5: Solve for x
   x = 937,500,536.64/42,709.56
6. Step 6: Final answer
   x = 21,950.60