Finding the Fourth Proportional to 205,978.32, 308,972.88 and 65,736.84

Step by Step Solution

1. Step 1: Write the proportion equation
   205,978.32 : 308,972.88 = 65,736.84 : x
2. Step 2: Convert to fraction form
   205,978.32/308,972.88 = 65,736.84/x
3. Step 3: Cross multiply
   205,978.32x = 308,972.88 × 65,736.84
4. Step 4: Simplify right side
   205,978.32x = 20,310,900,776.90
5. Step 5: Solve for x
   x = 20,310,900,776.90/205,978.32
6. Step 6: Final answer
   x = 98,606.98