Finding the Fourth Proportional to 57,145.35, 78,858.84 and 31,650.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,145.35 : 78,858.84 = 31,650.72 : x
2. Step 2: Convert to fraction form
   57,145.35/78,858.84 = 31,650.72/x
3. Step 3: Cross multiply
   57,145.35x = 78,858.84 × 31,650.72
4. Step 4: Simplify right side
   57,145.35x = 2,495,939,064.36
5. Step 5: Solve for x
   x = 2,495,939,064.36/57,145.35
6. Step 6: Final answer
   x = 43,677.03