Finding the Fourth Proportional to 139,560.32, 209,340.57 and 60,631.49

Step by Step Solution

1. Step 1: Write the proportion equation
   139,560.32 : 209,340.57 = 60,631.49 : x
2. Step 2: Convert to fraction form
   139,560.32/209,340.57 = 60,631.49/x
3. Step 3: Cross multiply
   139,560.32x = 209,340.57 × 60,631.49
4. Step 4: Simplify right side
   139,560.32x = 12,692,630,676.55
5. Step 5: Solve for x
   x = 12,692,630,676.55/139,560.32
6. Step 6: Final answer
   x = 90,947.27