Finding the Fourth Proportional to 269,228.42, 403,764.86 and 91,731.50

Step by Step Solution

1. Step 1: Write the proportion equation
   269,228.42 : 403,764.86 = 91,731.50 : x
2. Step 2: Convert to fraction form
   269,228.42/403,764.86 = 91,731.50/x
3. Step 3: Cross multiply
   269,228.42x = 403,764.86 × 91,731.50
4. Step 4: Simplify right side
   269,228.42x = 37,037,956,255.09
5. Step 5: Solve for x
   x = 37,037,956,255.09/269,228.42
6. Step 6: Final answer
   x = 137,570.75