Finding the Fourth Proportional to 116,820, 161,211.60 and 63,828

Step by Step Solution

1. Step 1: Write the proportion equation
   116,820 : 161,211.60 = 63,828 : x
2. Step 2: Convert to fraction form
   116,820/161,211.60 = 63,828/x
3. Step 3: Cross multiply
   116,820x = 161,211.60 × 63,828
4. Step 4: Simplify right side
   116,820x = 10,289,814,004.80
5. Step 5: Solve for x
   x = 10,289,814,004.80/116,820
6. Step 6: Final answer
   x = 88,082.64