Finding the Fourth Proportional to 93,109.78, 128,472.03 and 60,891.62

Step by Step Solution

1. Step 1: Write the proportion equation
   93,109.78 : 128,472.03 = 60,891.62 : x
2. Step 2: Convert to fraction form
   93,109.78/128,472.03 = 60,891.62/x
3. Step 3: Cross multiply
   93,109.78x = 128,472.03 × 60,891.62
4. Step 4: Simplify right side
   93,109.78x = 7,822,870,352.57
5. Step 5: Solve for x
   x = 7,822,870,352.57/93,109.78
6. Step 6: Final answer
   x = 84,017.71