Finding the Fourth Proportional to 42,732.84, 64,105.34 and 13,153.14

Step by Step Solution

1. Step 1: Write the proportion equation
   42,732.84 : 64,105.34 = 13,153.14 : x
2. Step 2: Convert to fraction form
   42,732.84/64,105.34 = 13,153.14/x
3. Step 3: Cross multiply
   42,732.84x = 64,105.34 × 13,153.14
4. Step 4: Simplify right side
   42,732.84x = 843,186,511.77
5. Step 5: Solve for x
   x = 843,186,511.77/42,732.84
6. Step 6: Final answer
   x = 19,731.58