Finding the Fourth Proportional to 90,064.77, 135,099.47 and 42,668.76

Step by Step Solution

1. Step 1: Write the proportion equation
   90,064.77 : 135,099.47 = 42,668.76 : x
2. Step 2: Convert to fraction form
   90,064.77/135,099.47 = 42,668.76/x
3. Step 3: Cross multiply
   90,064.77x = 135,099.47 × 42,668.76
4. Step 4: Simplify right side
   90,064.77x = 5,764,526,648.21
5. Step 5: Solve for x
   x = 5,764,526,648.21/90,064.77
6. Step 6: Final answer
   x = 64,004.23