Finding the Fourth Proportional to 42,688.40, 64,028.76 and 14,984.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,688.40 : 64,028.76 = 14,984.72 : x
2. Step 2: Convert to fraction form
   42,688.40/64,028.76 = 14,984.72/x
3. Step 3: Cross multiply
   42,688.40x = 64,028.76 × 14,984.72
4. Step 4: Simplify right side
   42,688.40x = 959,453,040.55
5. Step 5: Solve for x
   x = 959,453,040.55/42,688.40
6. Step 6: Final answer
   x = 22,475.73