Finding the Fourth Proportional to 78,992.28, 109,009.24 and 42,693.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,992.28 : 109,009.24 = 42,693.68 : x
2. Step 2: Convert to fraction form
   78,992.28/109,009.24 = 42,693.68/x
3. Step 3: Cross multiply
   78,992.28x = 109,009.24 × 42,693.68
4. Step 4: Simplify right side
   78,992.28x = 4,654,006,015.54
5. Step 5: Solve for x
   x = 4,654,006,015.54/78,992.28
6. Step 6: Final answer
   x = 58,917.23