Finding the Fourth Proportional to 61,087.98, 91,646.31 and 18,965.91

Step by Step Solution

1. Step 1: Write the proportion equation
   61,087.98 : 91,646.31 = 18,965.91 : x
2. Step 2: Convert to fraction form
   61,087.98/91,646.31 = 18,965.91/x
3. Step 3: Cross multiply
   61,087.98x = 91,646.31 × 18,965.91
4. Step 4: Simplify right side
   61,087.98x = 1,738,155,667.29
5. Step 5: Solve for x
   x = 1,738,155,667.29/61,087.98
6. Step 6: Final answer
   x = 28,453.32