Finding the Fourth Proportional to 111,664.72, 154,096.16 and 61,362.64

Step by Step Solution

1. Step 1: Write the proportion equation
   111,664.72 : 154,096.16 = 61,362.64 : x
2. Step 2: Convert to fraction form
   111,664.72/154,096.16 = 61,362.64/x
3. Step 3: Cross multiply
   111,664.72x = 154,096.16 × 61,362.64
4. Step 4: Simplify right side
   111,664.72x = 9,455,747,191.46
5. Step 5: Solve for x
   x = 9,455,747,191.46/111,664.72
6. Step 6: Final answer
   x = 84,679.81