Finding the Fourth Proportional to 42,770.34, 64,139.04 and 14,685.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,770.34 : 64,139.04 = 14,685.12 : x
2. Step 2: Convert to fraction form
   42,770.34/64,139.04 = 14,685.12/x
3. Step 3: Cross multiply
   42,770.34x = 64,139.04 × 14,685.12
4. Step 4: Simplify right side
   42,770.34x = 941,889,499.08
5. Step 5: Solve for x
   x = 941,889,499.08/42,770.34
6. Step 6: Final answer
   x = 22,022.03