Finding the Fourth Proportional to 42,838.30, 64,238.01 and 15,136.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,838.30 : 64,238.01 = 15,136.30 : x
2. Step 2: Convert to fraction form
   42,838.30/64,238.01 = 15,136.30/x
3. Step 3: Cross multiply
   42,838.30x = 64,238.01 × 15,136.30
4. Step 4: Simplify right side
   42,838.30x = 972,325,790.76
5. Step 5: Solve for x
   x = 972,325,790.76/42,838.30
6. Step 6: Final answer
   x = 22,697.58