Finding the Fourth Proportional to 64,978.63, 89,670.53 and 36,686.14

Step by Step Solution

1. Step 1: Write the proportion equation
   64,978.63 : 89,670.53 = 36,686.14 : x
2. Step 2: Convert to fraction form
   64,978.63/89,670.53 = 36,686.14/x
3. Step 3: Cross multiply
   64,978.63x = 89,670.53 × 36,686.14
4. Step 4: Simplify right side
   64,978.63x = 3,289,665,617.45
5. Step 5: Solve for x
   x = 3,289,665,617.45/64,978.63
6. Step 6: Final answer
   x = 50,626.88