Finding the Fourth Proportional to 43,136.72, 64,659 and 30,787.28

Step by Step Solution

1. Step 1: Write the proportion equation
   43,136.72 : 64,659 = 30,787.28 : x
2. Step 2: Convert to fraction form
   43,136.72/64,659 = 30,787.28/x
3. Step 3: Cross multiply
   43,136.72x = 64,659 × 30,787.28
4. Step 4: Simplify right side
   43,136.72x = 1,990,674,737.52
5. Step 5: Solve for x
   x = 1,990,674,737.52/43,136.72
6. Step 6: Final answer
   x = 46,148.03