Finding the Fourth Proportional to 111,144.96, 153,384.96 and 66,432

Step by Step Solution

1. Step 1: Write the proportion equation
   111,144.96 : 153,384.96 = 66,432 : x
2. Step 2: Convert to fraction form
   111,144.96/153,384.96 = 66,432/x
3. Step 3: Cross multiply
   111,144.96x = 153,384.96 × 66,432
4. Step 4: Simplify right side
   111,144.96x = 10,189,669,662.72
5. Step 5: Solve for x
   x = 10,189,669,662.72/111,144.96
6. Step 6: Final answer
   x = 91,679.10