Finding the Fourth Proportional to 78,649.99, 108,536.43 and 42,839.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,649.99 : 108,536.43 = 42,839.89 : x
2. Step 2: Convert to fraction form
   78,649.99/108,536.43 = 42,839.89/x
3. Step 3: Cross multiply
   78,649.99x = 108,536.43 × 42,839.89
4. Step 4: Simplify right side
   78,649.99x = 4,649,688,722.19
5. Step 5: Solve for x
   x = 4,649,688,722.19/78,649.99
6. Step 6: Final answer
   x = 59,118.75