Finding the Fourth Proportional to 42,709.18, 64,077.45 and 19,329.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,709.18 : 64,077.45 = 19,329.34 : x
2. Step 2: Convert to fraction form
   42,709.18/64,077.45 = 19,329.34/x
3. Step 3: Cross multiply
   42,709.18x = 64,077.45 × 19,329.34
4. Step 4: Simplify right side
   42,709.18x = 1,238,574,817.38
5. Step 5: Solve for x
   x = 1,238,574,817.38/42,709.18
6. Step 6: Final answer
   x = 29,000.20