Finding the Fourth Proportional to 56,628.06, 78,146.88 and 31,137.03

Step by Step Solution

1. Step 1: Write the proportion equation
   56,628.06 : 78,146.88 = 31,137.03 : x
2. Step 2: Convert to fraction form
   56,628.06/78,146.88 = 31,137.03/x
3. Step 3: Cross multiply
   56,628.06x = 78,146.88 × 31,137.03
4. Step 4: Simplify right side
   56,628.06x = 2,433,261,630.20
5. Step 5: Solve for x
   x = 2,433,261,630.20/56,628.06
6. Step 6: Final answer
   x = 42,969.19