Finding the Fourth Proportional to 42,769.18, 64,139.17 and 21,701.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,769.18 : 64,139.17 = 21,701.10 : x
2. Step 2: Convert to fraction form
   42,769.18/64,139.17 = 21,701.10/x
3. Step 3: Cross multiply
   42,769.18x = 64,139.17 × 21,701.10
4. Step 4: Simplify right side
   42,769.18x = 1,391,890,542.09
5. Step 5: Solve for x
   x = 1,391,890,542.09/42,769.18
6. Step 6: Final answer
   x = 32,544.24