Finding the Fourth Proportional to 61,131.98, 91,711.74 and 21,689.04

Step by Step Solution

1. Step 1: Write the proportion equation
   61,131.98 : 91,711.74 = 21,689.04 : x
2. Step 2: Convert to fraction form
   61,131.98/91,711.74 = 21,689.04/x
3. Step 3: Cross multiply
   61,131.98x = 91,711.74 × 21,689.04
4. Step 4: Simplify right side
   61,131.98x = 1,989,139,597.33
5. Step 5: Solve for x
   x = 1,989,139,597.33/61,131.98
6. Step 6: Final answer
   x = 32,538.45