Finding the Fourth Proportional to 57,112.12, 78,814.83 and 31,620.25

Step by Step Solution

1. Step 1: Write the proportion equation
   57,112.12 : 78,814.83 = 31,620.25 : x
2. Step 2: Convert to fraction form
   57,112.12/78,814.83 = 31,620.25/x
3. Step 3: Cross multiply
   57,112.12x = 78,814.83 × 31,620.25
4. Step 4: Simplify right side
   57,112.12x = 2,492,144,628.31
5. Step 5: Solve for x
   x = 2,492,144,628.31/57,112.12
6. Step 6: Final answer
   x = 43,636.00