Finding the Fourth Proportional to 90,401.96, 135,601.86 and 43,621.76

Step by Step Solution

1. Step 1: Write the proportion equation
   90,401.96 : 135,601.86 = 43,621.76 : x
2. Step 2: Convert to fraction form
   90,401.96/135,601.86 = 43,621.76/x
3. Step 3: Cross multiply
   90,401.96x = 135,601.86 × 43,621.76
4. Step 4: Simplify right side
   90,401.96x = 5,915,191,792.47
5. Step 5: Solve for x
   x = 5,915,191,792.47/90,401.96
6. Step 6: Final answer
   x = 65,432.12