Finding the Fourth Proportional to 46,978.72, 70,329.84 and 31,357.60

Step by Step Solution

1. Step 1: Write the proportion equation
   46,978.72 : 70,329.84 = 31,357.60 : x
2. Step 2: Convert to fraction form
   46,978.72/70,329.84 = 31,357.60/x
3. Step 3: Cross multiply
   46,978.72x = 70,329.84 × 31,357.60
4. Step 4: Simplify right side
   46,978.72x = 2,205,374,990.78
5. Step 5: Solve for x
   x = 2,205,374,990.78/46,978.72
6. Step 6: Final answer
   x = 46,944.13