Finding the Fourth Proportional to 307,990.96, 461,828.59 and 163,978.53

Step by Step Solution

1. Step 1: Write the proportion equation
   307,990.96 : 461,828.59 = 163,978.53 : x
2. Step 2: Convert to fraction form
   307,990.96/461,828.59 = 163,978.53/x
3. Step 3: Cross multiply
   307,990.96x = 461,828.59 × 163,978.53
4. Step 4: Simplify right side
   307,990.96x = 75,729,971,158.37
5. Step 5: Solve for x
   x = 75,729,971,158.37/307,990.96
6. Step 6: Final answer
   x = 245,883.75