Finding the Fourth Proportional to 212,667.90, 318,476.63 and 158,502.72

Step by Step Solution

1. Step 1: Write the proportion equation
   212,667.90 : 318,476.63 = 158,502.72 : x
2. Step 2: Convert to fraction form
   212,667.90/318,476.63 = 158,502.72/x
3. Step 3: Cross multiply
   212,667.90x = 318,476.63 × 158,502.72
4. Step 4: Simplify right side
   212,667.90x = 50,479,412,507.69
5. Step 5: Solve for x
   x = 50,479,412,507.69/212,667.90
6. Step 6: Final answer
   x = 237,362.63