Finding the Fourth Proportional to 355,442.18, 533,146.86 and 89,196.80

Step by Step Solution

1. Step 1: Write the proportion equation
   355,442.18 : 533,146.86 = 89,196.80 : x
2. Step 2: Convert to fraction form
   355,442.18/533,146.86 = 89,196.80/x
3. Step 3: Cross multiply
   355,442.18x = 533,146.86 × 89,196.80
4. Step 4: Simplify right side
   355,442.18x = 47,554,991,176.31
5. Step 5: Solve for x
   x = 47,554,991,176.31/355,442.18
6. Step 6: Final answer
   x = 133,791.08