Finding the Fourth Proportional to 42,715.37, 64,074.80 and 14,654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,715.37 : 64,074.80 = 14,654.72 : x
2. Step 2: Convert to fraction form
   42,715.37/64,074.80 = 14,654.72/x
3. Step 3: Cross multiply
   42,715.37x = 64,074.80 × 14,654.72
4. Step 4: Simplify right side
   42,715.37x = 938,997,969.32
5. Step 5: Solve for x
   x = 938,997,969.32/42,715.37
6. Step 6: Final answer
   x = 21,982.67