Finding the Fourth Proportional to 225,111.18, 337,667.27 and 91,991.43

Step by Step Solution

1. Step 1: Write the proportion equation
   225,111.18 : 337,667.27 = 91,991.43 : x
2. Step 2: Convert to fraction form
   225,111.18/337,667.27 = 91,991.43/x
3. Step 3: Cross multiply
   225,111.18x = 337,667.27 × 91,991.43
4. Step 4: Simplify right side
   225,111.18x = 31,062,494,571.54
5. Step 5: Solve for x
   x = 31,062,494,571.54/225,111.18
6. Step 6: Final answer
   x = 137,987.35