Finding the Fourth Proportional to 61,288.31, 91,921.43 and 16,309.89

Step by Step Solution

1. Step 1: Write the proportion equation
   61,288.31 : 91,921.43 = 16,309.89 : x
2. Step 2: Convert to fraction form
   61,288.31/91,921.43 = 16,309.89/x
3. Step 3: Cross multiply
   61,288.31x = 91,921.43 × 16,309.89
4. Step 4: Simplify right side
   61,288.31x = 1,499,228,452.72
5. Step 5: Solve for x
   x = 1,499,228,452.72/61,288.31
6. Step 6: Final answer
   x = 24,461.90