Finding the Fourth Proportional to 157,667.31, 217,581.66 and 86,049

Step by Step Solution

1. Step 1: Write the proportion equation
   157,667.31 : 217,581.66 = 86,049 : x
2. Step 2: Convert to fraction form
   157,667.31/217,581.66 = 86,049/x
3. Step 3: Cross multiply
   157,667.31x = 217,581.66 × 86,049
4. Step 4: Simplify right side
   157,667.31x = 18,722,684,261.34
5. Step 5: Solve for x
   x = 18,722,684,261.34/157,667.31
6. Step 6: Final answer
   x = 118,748.04