Finding the Fourth Proportional to 89,792.05, 134,688.75 and 39,858.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,792.05 : 134,688.75 = 39,858.72 : x
2. Step 2: Convert to fraction form
   89,792.05/134,688.75 = 39,858.72/x
3. Step 3: Cross multiply
   89,792.05x = 134,688.75 × 39,858.72
4. Step 4: Simplify right side
   89,792.05x = 5,368,520,974.11
5. Step 5: Solve for x
   x = 5,368,520,974.11/89,792.05
6. Step 6: Final answer
   x = 59,788.38