Finding the Fourth Proportional to 111,787.36, 154,405 and 81,111.23

Step by Step Solution

1. Step 1: Write the proportion equation
   111,787.36 : 154,405 = 81,111.23 : x
2. Step 2: Convert to fraction form
   111,787.36/154,405 = 81,111.23/x
3. Step 3: Cross multiply
   111,787.36x = 154,405 × 81,111.23
4. Step 4: Simplify right side
   111,787.36x = 12,523,979,468.15
5. Step 5: Solve for x
   x = 12,523,979,468.15/111,787.36
6. Step 6: Final answer
   x = 112,033.95