Finding the Fourth Proportional to 90,651.47, 135,938.76 and 43,211.69

Step by Step Solution

1. Step 1: Write the proportion equation
   90,651.47 : 135,938.76 = 43,211.69 : x
2. Step 2: Convert to fraction form
   90,651.47/135,938.76 = 43,211.69/x
3. Step 3: Cross multiply
   90,651.47x = 135,938.76 × 43,211.69
4. Step 4: Simplify right side
   90,651.47x = 5,874,143,556.10
5. Step 5: Solve for x
   x = 5,874,143,556.10/90,651.47
6. Step 6: Final answer
   x = 64,799.21