Finding the Fourth Proportional to 61,164.86, 91,725.27 and 21,172.97

Step by Step Solution

1. Step 1: Write the proportion equation
   61,164.86 : 91,725.27 = 21,172.97 : x
2. Step 2: Convert to fraction form
   61,164.86/91,725.27 = 21,172.97/x
3. Step 3: Cross multiply
   61,164.86x = 91,725.27 × 21,172.97
4. Step 4: Simplify right side
   61,164.86x = 1,942,096,619.27
5. Step 5: Solve for x
   x = 1,942,096,619.27/61,164.86
6. Step 6: Final answer
   x = 31,751.84