Finding the Fourth Proportional to 146,046.51, 201,544.07 and 78,978.51

Step by Step Solution

1. Step 1: Write the proportion equation
   146,046.51 : 201,544.07 = 78,978.51 : x
2. Step 2: Convert to fraction form
   146,046.51/201,544.07 = 78,978.51/x
3. Step 3: Cross multiply
   146,046.51x = 201,544.07 × 78,978.51
4. Step 4: Simplify right side
   146,046.51x = 15,917,649,953.04
5. Step 5: Solve for x
   x = 15,917,649,953.04/146,046.51
6. Step 6: Final answer
   x = 108,990.28