Finding the Fourth Proportional to 109,257.63, 150,817.83 and 85,392

Step by Step Solution

1. Step 1: Write the proportion equation
   109,257.63 : 150,817.83 = 85,392 : x
2. Step 2: Convert to fraction form
   109,257.63/150,817.83 = 85,392/x
3. Step 3: Cross multiply
   109,257.63x = 150,817.83 × 85,392
4. Step 4: Simplify right side
   109,257.63x = 12,878,636,139.36
5. Step 5: Solve for x
   x = 12,878,636,139.36/109,257.63
6. Step 6: Final answer
   x = 117,874.02