Finding the Fourth Proportional to 105,612.42, 145,874.62 and 85,492.02

Step by Step Solution

1. Step 1: Write the proportion equation
   105,612.42 : 145,874.62 = 85,492.02 : x
2. Step 2: Convert to fraction form
   105,612.42/145,874.62 = 85,492.02/x
3. Step 3: Cross multiply
   105,612.42x = 145,874.62 × 85,492.02
4. Step 4: Simplify right side
   105,612.42x = 12,471,115,930.53
5. Step 5: Solve for x
   x = 12,471,115,930.53/105,612.42
6. Step 6: Final answer
   x = 118,083.80