Finding the Fourth Proportional to 116,779.65, 161,171.55 and 65,802.30

Step by Step Solution

1. Step 1: Write the proportion equation
   116,779.65 : 161,171.55 = 65,802.30 : x
2. Step 2: Convert to fraction form
   116,779.65/161,171.55 = 65,802.30/x
3. Step 3: Cross multiply
   116,779.65x = 161,171.55 × 65,802.30
4. Step 4: Simplify right side
   116,779.65x = 10,605,458,684.57
5. Step 5: Solve for x
   x = 10,605,458,684.57/116,779.65
6. Step 6: Final answer
   x = 90,815.98