Finding the Fourth Proportional to 57,111.12, 78,813.45 and 31,619.25

Step by Step Solution

1. Step 1: Write the proportion equation
   57,111.12 : 78,813.45 = 31,619.25 : x
2. Step 2: Convert to fraction form
   57,111.12/78,813.45 = 31,619.25/x
3. Step 3: Cross multiply
   57,111.12x = 78,813.45 × 31,619.25
4. Step 4: Simplify right side
   57,111.12x = 2,492,022,178.91
5. Step 5: Solve for x
   x = 2,492,022,178.91/57,111.12
6. Step 6: Final answer
   x = 43,634.62