Finding the Fourth Proportional to 64,978.56, 89,670.74 and 35,170.56

Step by Step Solution

1. Step 1: Write the proportion equation
   64,978.56 : 89,670.74 = 35,170.56 : x
2. Step 2: Convert to fraction form
   64,978.56/89,670.74 = 35,170.56/x
3. Step 3: Cross multiply
   64,978.56x = 89,670.74 × 35,170.56
4. Step 4: Simplify right side
   64,978.56x = 3,153,770,141.41
5. Step 5: Solve for x
   x = 3,153,770,141.41/64,978.56
6. Step 6: Final answer
   x = 48,535.55