Finding the Fourth Proportional to 249,667.45, 374,464.31 and 91,859.20

Step by Step Solution

1. Step 1: Write the proportion equation
   249,667.45 : 374,464.31 = 91,859.20 : x
2. Step 2: Convert to fraction form
   249,667.45/374,464.31 = 91,859.20/x
3. Step 3: Cross multiply
   249,667.45x = 374,464.31 × 91,859.20
4. Step 4: Simplify right side
   249,667.45x = 34,397,990,072.83
5. Step 5: Solve for x
   x = 34,397,990,072.83/249,667.45
6. Step 6: Final answer
   x = 137,775.23