Finding the Fourth Proportional to 116,820.21, 161,212.52 and 65,833.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,820.21 : 161,212.52 = 65,833.72 : x
2. Step 2: Convert to fraction form
   116,820.21/161,212.52 = 65,833.72/x
3. Step 3: Cross multiply
   116,820.21x = 161,212.52 × 65,833.72
4. Step 4: Simplify right side
   116,820.21x = 10,613,219,902.17
5. Step 5: Solve for x
   x = 10,613,219,902.17/116,820.21
6. Step 6: Final answer
   x = 90,850.89