Finding the Fourth Proportional to 104,436.32, 156,384.69 and 72,078.37

Step by Step Solution

1. Step 1: Write the proportion equation
   104,436.32 : 156,384.69 = 72,078.37 : x
2. Step 2: Convert to fraction form
   104,436.32/156,384.69 = 72,078.37/x
3. Step 3: Cross multiply
   104,436.32x = 156,384.69 × 72,078.37
4. Step 4: Simplify right side
   104,436.32x = 11,271,954,136.65
5. Step 5: Solve for x
   x = 11,271,954,136.65/104,436.32
6. Step 6: Final answer
   x = 107,931.36