Finding the Fourth Proportional to 158,603.31, 218,875.38 and 86,982.69

Step by Step Solution

1. Step 1: Write the proportion equation
   158,603.31 : 218,875.38 = 86,982.69 : x
2. Step 2: Convert to fraction form
   158,603.31/218,875.38 = 86,982.69/x
3. Step 3: Cross multiply
   158,603.31x = 218,875.38 × 86,982.69
4. Step 4: Simplify right side
   158,603.31x = 19,038,369,327.17
5. Step 5: Solve for x
   x = 19,038,369,327.17/158,603.31
6. Step 6: Final answer
   x = 120,037.65