Finding the Fourth Proportional to 56,645.71, 78,173.09 and 31,154.05

Step by Step Solution

1. Step 1: Write the proportion equation
   56,645.71 : 78,173.09 = 31,154.05 : x
2. Step 2: Convert to fraction form
   56,645.71/78,173.09 = 31,154.05/x
3. Step 3: Cross multiply
   56,645.71x = 78,173.09 × 31,154.05
4. Step 4: Simplify right side
   56,645.71x = 2,435,408,003.31
5. Step 5: Solve for x
   x = 2,435,408,003.31/56,645.71
6. Step 6: Final answer
   x = 42,993.69