Finding the Fourth Proportional to 64,979.50, 89,671.98 and 35,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,979.50 : 89,671.98 = 35,171.50 : x
2. Step 2: Convert to fraction form
   64,979.50/89,671.98 = 35,171.50/x
3. Step 3: Cross multiply
   64,979.50x = 89,671.98 × 35,171.50
4. Step 4: Simplify right side
   64,979.50x = 3,153,898,044.57
5. Step 5: Solve for x
   x = 3,153,898,044.57/64,979.50
6. Step 6: Final answer
   x = 48,536.82