Finding the Fourth Proportional to 91,564.56, 137,383.01 and 28,389.68

Step by Step Solution

1. Step 1: Write the proportion equation
   91,564.56 : 137,383.01 = 28,389.68 : x
2. Step 2: Convert to fraction form
   91,564.56/137,383.01 = 28,389.68/x
3. Step 3: Cross multiply
   91,564.56x = 137,383.01 × 28,389.68
4. Step 4: Simplify right side
   91,564.56x = 3,900,258,862.47
5. Step 5: Solve for x
   x = 3,900,258,862.47/91,564.56
6. Step 6: Final answer
   x = 42,595.73