Finding the Fourth Proportional to 82,769.30, 124,413.15 and 81,214.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,769.30 : 124,413.15 = 81,214.10 : x
2. Step 2: Convert to fraction form
   82,769.30/124,413.15 = 81,214.10/x
3. Step 3: Cross multiply
   82,769.30x = 124,413.15 × 81,214.10
4. Step 4: Simplify right side
   82,769.30x = 10,104,102,005.42
5. Step 5: Solve for x
   x = 10,104,102,005.42/82,769.30
6. Step 6: Final answer
   x = 122,075.48