Finding the Fourth Proportional to 78,649.89, 108,560.57 and 53,513.97

Step by Step Solution

1. Step 1: Write the proportion equation
   78,649.89 : 108,560.57 = 53,513.97 : x
2. Step 2: Convert to fraction form
   78,649.89/108,560.57 = 53,513.97/x
3. Step 3: Cross multiply
   78,649.89x = 108,560.57 × 53,513.97
4. Step 4: Simplify right side
   78,649.89x = 5,809,507,086.16
5. Step 5: Solve for x
   x = 5,809,507,086.16/78,649.89
6. Step 6: Final answer
   x = 73,865.42