Finding the Fourth Proportional to 143,528.16, 197,931.42 and 109,476.12

Step by Step Solution

1. Step 1: Write the proportion equation
   143,528.16 : 197,931.42 = 109,476.12 : x
2. Step 2: Convert to fraction form
   143,528.16/197,931.42 = 109,476.12/x
3. Step 3: Cross multiply
   143,528.16x = 197,931.42 × 109,476.12
4. Step 4: Simplify right side
   143,528.16x = 21,668,763,887.69
5. Step 5: Solve for x
   x = 21,668,763,887.69/143,528.16
6. Step 6: Final answer
   x = 150,972.21