Finding the Fourth Proportional to 147,335.69, 203,347.89 and 86,921.31

Step by Step Solution

1. Step 1: Write the proportion equation
   147,335.69 : 203,347.89 = 86,921.31 : x
2. Step 2: Convert to fraction form
   147,335.69/203,347.89 = 86,921.31/x
3. Step 3: Cross multiply
   147,335.69x = 203,347.89 × 86,921.31
4. Step 4: Simplify right side
   147,335.69x = 17,675,264,984.54
5. Step 5: Solve for x
   x = 17,675,264,984.54/147,335.69
6. Step 6: Final answer
   x = 119,965.95