Finding the Fourth Proportional to 64,978.08, 89,669.76 and 35,170.08

Step by Step Solution

1. Step 1: Write the proportion equation
   64,978.08 : 89,669.76 = 35,170.08 : x
2. Step 2: Convert to fraction form
   64,978.08/89,669.76 = 35,170.08/x
3. Step 3: Cross multiply
   64,978.08x = 89,669.76 × 35,170.08
4. Step 4: Simplify right side
   64,978.08x = 3,153,692,632.78
5. Step 5: Solve for x
   x = 3,153,692,632.78/64,978.08
6. Step 6: Final answer
   x = 48,534.72