Finding the Fourth Proportional to 139,866.18, 209,817.59 and 51,161.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139,866.18 : 209,817.59 = 51,161.46 : x
2. Step 2: Convert to fraction form
   139,866.18/209,817.59 = 51,161.46/x
3. Step 3: Cross multiply
   139,866.18x = 209,817.59 × 51,161.46
4. Step 4: Simplify right side
   139,866.18x = 10,734,574,238.08
5. Step 5: Solve for x
   x = 10,734,574,238.08/139,866.18
6. Step 6: Final answer
   x = 76,748.89