Finding the Fourth Proportional to 78,659.78, 108,590.73 and 53,300.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,659.78 : 108,590.73 = 53,300.16 : x
2. Step 2: Convert to fraction form
   78,659.78/108,590.73 = 53,300.16/x
3. Step 3: Cross multiply
   78,659.78x = 108,590.73 × 53,300.16
4. Step 4: Simplify right side
   78,659.78x = 5,787,903,083.64
5. Step 5: Solve for x
   x = 5,787,903,083.64/78,659.78
6. Step 6: Final answer
   x = 73,581.49