Finding the Fourth Proportional to 116,772, 161,149.20 and 63,780

Step by Step Solution

1. Step 1: Write the proportion equation
   116,772 : 161,149.20 = 63,780 : x
2. Step 2: Convert to fraction form
   116,772/161,149.20 = 63,780/x
3. Step 3: Cross multiply
   116,772x = 161,149.20 × 63,780
4. Step 4: Simplify right side
   116,772x = 10,278,095,976
5. Step 5: Solve for x
   x = 10,278,095,976/116,772
6. Step 6: Final answer
   x = 88,018.50