Finding the Fourth Proportional to 225,105.53, 337,658.83 and 91,985.78

Step by Step Solution

1. Step 1: Write the proportion equation
   225,105.53 : 337,658.83 = 91,985.78 : x
2. Step 2: Convert to fraction form
   225,105.53/337,658.83 = 91,985.78/x
3. Step 3: Cross multiply
   225,105.53x = 337,658.83 × 91,985.78
4. Step 4: Simplify right side
   225,105.53x = 31,059,809,566.29
5. Step 5: Solve for x
   x = 31,059,809,566.29/225,105.53
6. Step 6: Final answer
   x = 137,978.88