Finding the Fourth Proportional to 116,861.16, 161,224.83 and 78,560.01

Step by Step Solution

1. Step 1: Write the proportion equation
   116,861.16 : 161,224.83 = 78,560.01 : x
2. Step 2: Convert to fraction form
   116,861.16/161,224.83 = 78,560.01/x
3. Step 3: Cross multiply
   116,861.16x = 161,224.83 × 78,560.01
4. Step 4: Simplify right side
   116,861.16x = 12,665,824,257.05
5. Step 5: Solve for x
   x = 12,665,824,257.05/116,861.16
6. Step 6: Final answer
   x = 108,383.52