Finding the Fourth Proportional to 78,649.78, 108,538.62 and 42,841.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,649.78 : 108,538.62 = 42,841.72 : x
2. Step 2: Convert to fraction form
   78,649.78/108,538.62 = 42,841.72/x
3. Step 3: Cross multiply
   78,649.78x = 108,538.62 × 42,841.72
4. Step 4: Simplify right side
   78,649.78x = 4,649,981,167.23
5. Step 5: Solve for x
   x = 4,649,981,167.23/78,649.78
6. Step 6: Final answer
   x = 59,122.62