Finding the Fourth Proportional to 139,683.12, 209,519.04 and 34,499.40

Step by Step Solution

1. Step 1: Write the proportion equation
   139,683.12 : 209,519.04 = 34,499.40 : x
2. Step 2: Convert to fraction form
   139,683.12/209,519.04 = 34,499.40/x
3. Step 3: Cross multiply
   139,683.12x = 209,519.04 × 34,499.40
4. Step 4: Simplify right side
   139,683.12x = 7,228,281,168.58
5. Step 5: Solve for x
   x = 7,228,281,168.58/139,683.12
6. Step 6: Final answer
   x = 51,747.71