Finding the Fourth Proportional to 91,906.64, 137,666.21 and 42,028.71

Step by Step Solution

1. Step 1: Write the proportion equation
   91,906.64 : 137,666.21 = 42,028.71 : x
2. Step 2: Convert to fraction form
   91,906.64/137,666.21 = 42,028.71/x
3. Step 3: Cross multiply
   91,906.64x = 137,666.21 × 42,028.71
4. Step 4: Simplify right side
   91,906.64x = 5,785,933,006.75
5. Step 5: Solve for x
   x = 5,785,933,006.75/91,906.64
6. Step 6: Final answer
   x = 62,954.46