Finding the Fourth Proportional to 116,991.40, 161,455.52 and 65,985.52

Step by Step Solution

1. Step 1: Write the proportion equation
   116,991.40 : 161,455.52 = 65,985.52 : x
2. Step 2: Convert to fraction form
   116,991.40/161,455.52 = 65,985.52/x
3. Step 3: Cross multiply
   116,991.40x = 161,455.52 × 65,985.52
4. Step 4: Simplify right side
   116,991.40x = 10,653,726,444.07
5. Step 5: Solve for x
   x = 10,653,726,444.07/116,991.40
6. Step 6: Final answer
   x = 91,064.18