Finding the Fourth Proportional to 78,649.39, 108,559.88 and 53,513.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,649.39 : 108,559.88 = 53,513.47 : x
2. Step 2: Convert to fraction form
   78,649.39/108,559.88 = 53,513.47/x
3. Step 3: Cross multiply
   78,649.39x = 108,559.88 × 53,513.47
4. Step 4: Simplify right side
   78,649.39x = 5,809,415,614.02
5. Step 5: Solve for x
   x = 5,809,415,614.02/78,649.39
6. Step 6: Final answer
   x = 73,864.73