Finding the Fourth Proportional to 78,649.63, 108,536.64 and 42,839.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,649.63 : 108,536.64 = 42,839.53 : x
2. Step 2: Convert to fraction form
   78,649.63/108,536.64 = 42,839.53/x
3. Step 3: Cross multiply
   78,649.63x = 108,536.64 × 42,839.53
4. Step 4: Simplify right side
   78,649.63x = 4,649,658,645.38
5. Step 5: Solve for x
   x = 4,649,658,645.38/78,649.63
6. Step 6: Final answer
   x = 59,118.63