Finding the Fourth Proportional to 155,748.56, 214,986.39 and 91,238.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,748.56 : 214,986.39 = 91,238.50 : x
2. Step 2: Convert to fraction form
   155,748.56/214,986.39 = 91,238.50/x
3. Step 3: Cross multiply
   155,748.56x = 214,986.39 × 91,238.50
4. Step 4: Simplify right side
   155,748.56x = 19,615,035,670.60
5. Step 5: Solve for x
   x = 19,615,035,670.60/155,748.56
6. Step 6: Final answer
   x = 125,940.40