Finding the Fourth Proportional to 181,631.89, 272,448.06 and 86,839.78

Step by Step Solution

1. Step 1: Write the proportion equation
   181,631.89 : 272,448.06 = 86,839.78 : x
2. Step 2: Convert to fraction form
   181,631.89/272,448.06 = 86,839.78/x
3. Step 3: Cross multiply
   181,631.89x = 272,448.06 × 86,839.78
4. Step 4: Simplify right side
   181,631.89x = 23,659,329,591.83
5. Step 5: Solve for x
   x = 23,659,329,591.83/181,631.89
6. Step 6: Final answer
   x = 130,259.78