Finding the Fourth Proportional to 61,087.68, 91,605.60 and 21,654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   61,087.68 : 91,605.60 = 21,654.72 : x
2. Step 2: Convert to fraction form
   61,087.68/91,605.60 = 21,654.72/x
3. Step 3: Cross multiply
   61,087.68x = 91,605.60 × 21,654.72
4. Step 4: Simplify right side
   61,087.68x = 1,983,693,618.43
5. Step 5: Solve for x
   x = 1,983,693,618.43/61,087.68
6. Step 6: Final answer
   x = 32,472.89