Finding the Fourth Proportional to 78,357.78, 117,536.13 and 31,609.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,357.78 : 117,536.13 = 31,609.98 : x
2. Step 2: Convert to fraction form
   78,357.78/117,536.13 = 31,609.98/x
3. Step 3: Cross multiply
   78,357.78x = 117,536.13 × 31,609.98
4. Step 4: Simplify right side
   78,357.78x = 3,715,314,718.58
5. Step 5: Solve for x
   x = 3,715,314,718.58/78,357.78
6. Step 6: Final answer
   x = 47,414.75