Finding the Fourth Proportional to 249,401.70, 374,250.06 and 91,740.78

Step by Step Solution

1. Step 1: Write the proportion equation
   249,401.70 : 374,250.06 = 91,740.78 : x
2. Step 2: Convert to fraction form
   249,401.70/374,250.06 = 91,740.78/x
3. Step 3: Cross multiply
   249,401.70x = 374,250.06 × 91,740.78
4. Step 4: Simplify right side
   249,401.70x = 34,333,992,419.45
5. Step 5: Solve for x
   x = 34,333,992,419.45/249,401.70
6. Step 6: Final answer
   x = 137,665.43