Finding the Fourth Proportional to 56,706.81, 78,255.90 and 31,556.31

Step by Step Solution

1. Step 1: Write the proportion equation
   56,706.81 : 78,255.90 = 31,556.31 : x
2. Step 2: Convert to fraction form
   56,706.81/78,255.90 = 31,556.31/x
3. Step 3: Cross multiply
   56,706.81x = 78,255.90 × 31,556.31
4. Step 4: Simplify right side
   56,706.81x = 2,469,467,439.73
5. Step 5: Solve for x
   x = 2,469,467,439.73/56,706.81
6. Step 6: Final answer
   x = 43,547.99