Finding the Fourth Proportional to 81,233.69, 121,849.72 and 61,632.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,233.69 : 121,849.72 = 61,632.50 : x
2. Step 2: Convert to fraction form
   81,233.69/121,849.72 = 61,632.50/x
3. Step 3: Cross multiply
   81,233.69x = 121,849.72 × 61,632.50
4. Step 4: Simplify right side
   81,233.69x = 7,509,902,104.57
5. Step 5: Solve for x
   x = 7,509,902,104.57/81,233.69
6. Step 6: Final answer
   x = 92,448.13