Finding the Fourth Proportional to 298,342.55, 447,528.59 and 85,141.89

Step by Step Solution

1. Step 1: Write the proportion equation
   298,342.55 : 447,528.59 = 85,141.89 : x
2. Step 2: Convert to fraction form
   298,342.55/447,528.59 = 85,141.89/x
3. Step 3: Cross multiply
   298,342.55x = 447,528.59 × 85,141.89
4. Step 4: Simplify right side
   298,342.55x = 38,103,429,555.93
5. Step 5: Solve for x
   x = 38,103,429,555.93/298,342.55
6. Step 6: Final answer
   x = 127,717.05