Finding the Fourth Proportional to 357,459.27, 536,188.56 and 91,219.78

Step by Step Solution

1. Step 1: Write the proportion equation
   357,459.27 : 536,188.56 = 91,219.78 : x
2. Step 2: Convert to fraction form
   357,459.27/536,188.56 = 91,219.78/x
3. Step 3: Cross multiply
   357,459.27x = 536,188.56 × 91,219.78
4. Step 4: Simplify right side
   357,459.27x = 48,911,002,481.72
5. Step 5: Solve for x
   x = 48,911,002,481.72/357,459.27
6. Step 6: Final answer
   x = 136,829.58