Finding the Fourth Proportional to 90,109.92, 135,173.52 and 40,188

Step by Step Solution

1. Step 1: Write the proportion equation
   90,109.92 : 135,173.52 = 40,188 : x
2. Step 2: Convert to fraction form
   90,109.92/135,173.52 = 40,188/x
3. Step 3: Cross multiply
   90,109.92x = 135,173.52 × 40,188
4. Step 4: Simplify right side
   90,109.92x = 5,432,353,421.76
5. Step 5: Solve for x
   x = 5,432,353,421.76/90,109.92
6. Step 6: Final answer
   x = 60,285.85