Finding the Fourth Proportional to 64,659.44, 89,222.76 and 35,978

Step by Step Solution

1. Step 1: Write the proportion equation
   64,659.44 : 89,222.76 = 35,978 : x
2. Step 2: Convert to fraction form
   64,659.44/89,222.76 = 35,978/x
3. Step 3: Cross multiply
   64,659.44x = 89,222.76 × 35,978
4. Step 4: Simplify right side
   64,659.44x = 3,210,056,459.28
5. Step 5: Solve for x
   x = 3,210,056,459.28/64,659.44
6. Step 6: Final answer
   x = 49,645.60