Finding the Fourth Proportional to 108,605.76, 149,878.56 and 60,206.72

Step by Step Solution

1. Step 1: Write the proportion equation
   108,605.76 : 149,878.56 = 60,206.72 : x
2. Step 2: Convert to fraction form
   108,605.76/149,878.56 = 60,206.72/x
3. Step 3: Cross multiply
   108,605.76x = 149,878.56 × 60,206.72
4. Step 4: Simplify right side
   108,605.76x = 9,023,696,495.92
5. Step 5: Solve for x
   x = 9,023,696,495.92/108,605.76
6. Step 6: Final answer
   x = 83,086.72