Finding the Fourth Proportional to 57,145.36, 78,858.86 and 31,650.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,145.36 : 78,858.86 = 31,650.72 : x
2. Step 2: Convert to fraction form
   57,145.36/78,858.86 = 31,650.72/x
3. Step 3: Cross multiply
   57,145.36x = 78,858.86 × 31,650.72
4. Step 4: Simplify right side
   57,145.36x = 2,495,939,697.38
5. Step 5: Solve for x
   x = 2,495,939,697.38/57,145.36
6. Step 6: Final answer
   x = 43,677.03