Finding the Fourth Proportional to 146,046.15, 201,543.57 and 78,978.15

Step by Step Solution

1. Step 1: Write the proportion equation
   146,046.15 : 201,543.57 = 78,978.15 : x
2. Step 2: Convert to fraction form
   146,046.15/201,543.57 = 78,978.15/x
3. Step 3: Cross multiply
   146,046.15x = 201,543.57 × 78,978.15
4. Step 4: Simplify right side
   146,046.15x = 15,917,538,303.00
5. Step 5: Solve for x
   x = 15,917,538,303.00/146,046.15
6. Step 6: Final answer
   x = 108,989.78