Finding the Fourth Proportional to 57,860, 86,724.72 and 31,556

Step by Step Solution

1. Step 1: Write the proportion equation
   57,860 : 86,724.72 = 31,556 : x
2. Step 2: Convert to fraction form
   57,860/86,724.72 = 31,556/x
3. Step 3: Cross multiply
   57,860x = 86,724.72 × 31,556
4. Step 4: Simplify right side
   57,860x = 2,736,685,264.32
5. Step 5: Solve for x
   x = 2,736,685,264.32/57,860
6. Step 6: Final answer
   x = 47,298.40