Finding the Fourth Proportional to 64,947.75, 89,627.90 and 35,139.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,947.75 : 89,627.90 = 35,139.75 : x
2. Step 2: Convert to fraction form
   64,947.75/89,627.90 = 35,139.75/x
3. Step 3: Cross multiply
   64,947.75x = 89,627.90 × 35,139.75
4. Step 4: Simplify right side
   64,947.75x = 3,149,501,823.33
5. Step 5: Solve for x
   x = 3,149,501,823.33/64,947.75
6. Step 6: Final answer
   x = 48,492.86