Finding the Fourth Proportional to 85,930.62, 128,743.42 and 35,900.61

Step by Step Solution

1. Step 1: Write the proportion equation
   85,930.62 : 128,743.42 = 35,900.61 : x
2. Step 2: Convert to fraction form
   85,930.62/128,743.42 = 35,900.61/x
3. Step 3: Cross multiply
   85,930.62x = 128,743.42 × 35,900.61
4. Step 4: Simplify right side
   85,930.62x = 4,621,966,488.27
5. Step 5: Solve for x
   x = 4,621,966,488.27/85,930.62
6. Step 6: Final answer
   x = 53,787.19