Finding the Fourth Proportional to 139,613.08, 209,540.54 and 73,099.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,613.08 : 209,540.54 = 73,099.76 : x
2. Step 2: Convert to fraction form
   139,613.08/209,540.54 = 73,099.76/x
3. Step 3: Cross multiply
   139,613.08x = 209,540.54 × 73,099.76
4. Step 4: Simplify right side
   139,613.08x = 15,317,363,184.27
5. Step 5: Solve for x
   x = 15,317,363,184.27/139,613.08
6. Step 6: Final answer
   x = 109,712.95