Finding the Fourth Proportional to 56,669.87, 78,201.33 and 31,172.12

Step by Step Solution

1. Step 1: Write the proportion equation
   56,669.87 : 78,201.33 = 31,172.12 : x
2. Step 2: Convert to fraction form
   56,669.87/78,201.33 = 31,172.12/x
3. Step 3: Cross multiply
   56,669.87x = 78,201.33 × 31,172.12
4. Step 4: Simplify right side
   56,669.87x = 2,437,701,087.06
5. Step 5: Solve for x
   x = 2,437,701,087.06/56,669.87
6. Step 6: Final answer
   x = 43,015.82