Finding the Fourth Proportional to 249,555, 374,107.86 and 91,749.72

Step by Step Solution

1. Step 1: Write the proportion equation
   249,555 : 374,107.86 = 91,749.72 : x
2. Step 2: Convert to fraction form
   249,555/374,107.86 = 91,749.72/x
3. Step 3: Cross multiply
   249,555x = 374,107.86 × 91,749.72
4. Step 4: Simplify right side
   249,555x = 34,324,291,404.80
5. Step 5: Solve for x
   x = 34,324,291,404.80/249,555
6. Step 6: Final answer
   x = 137,541.99