Finding the Fourth Proportional to 116,819.31, 161,206.81 and 73,821.78

Step by Step Solution

1. Step 1: Write the proportion equation
   116,819.31 : 161,206.81 = 73,821.78 : x
2. Step 2: Convert to fraction form
   116,819.31/161,206.81 = 73,821.78/x
3. Step 3: Cross multiply
   116,819.31x = 161,206.81 × 73,821.78
4. Step 4: Simplify right side
   116,819.31x = 11,900,573,477.77
5. Step 5: Solve for x
   x = 11,900,573,477.77/116,819.31
6. Step 6: Final answer
   x = 101,871.63