Finding the Fourth Proportional to 57,106.39, 78,805.86 and 31,612.21

Step by Step Solution

1. Step 1: Write the proportion equation
   57,106.39 : 78,805.86 = 31,612.21 : x
2. Step 2: Convert to fraction form
   57,106.39/78,805.86 = 31,612.21/x
3. Step 3: Cross multiply
   57,106.39x = 78,805.86 × 31,612.21
4. Step 4: Simplify right side
   57,106.39x = 2,491,227,490.25
5. Step 5: Solve for x
   x = 2,491,227,490.25/57,106.39
6. Step 6: Final answer
   x = 43,624.32