Finding the Fourth Proportional to 90,399.96, 135,598.86 and 43,619.76

Step by Step Solution

1. Step 1: Write the proportion equation
   90,399.96 : 135,598.86 = 43,619.76 : x
2. Step 2: Convert to fraction form
   90,399.96/135,598.86 = 43,619.76/x
3. Step 3: Cross multiply
   90,399.96x = 135,598.86 × 43,619.76
4. Step 4: Simplify right side
   90,399.96x = 5,914,789,729.47
5. Step 5: Solve for x
   x = 5,914,789,729.47/90,399.96
6. Step 6: Final answer
   x = 65,429.12