Finding the Fourth Proportional to 91,605.23, 137,427.47 and 28,424.00

Step by Step Solution

1. Step 1: Write the proportion equation
   91,605.23 : 137,427.47 = 28,424.00 : x
2. Step 2: Convert to fraction form
   91,605.23/137,427.47 = 28,424.00/x
3. Step 3: Cross multiply
   91,605.23x = 137,427.47 × 28,424.00
4. Step 4: Simplify right side
   91,605.23x = 3,906,237,578.02
5. Step 5: Solve for x
   x = 3,906,237,578.02/91,605.23
6. Step 6: Final answer
   x = 42,642.08