Finding the Fourth Proportional to 128,965.82, 193,268.52 and 109,890.81

Step by Step Solution

1. Step 1: Write the proportion equation
   128,965.82 : 193,268.52 = 109,890.81 : x
2. Step 2: Convert to fraction form
   128,965.82/193,268.52 = 109,890.81/x
3. Step 3: Cross multiply
   128,965.82x = 193,268.52 × 109,890.81
4. Step 4: Simplify right side
   128,965.82x = 21,238,434,210.30
5. Step 5: Solve for x
   x = 21,238,434,210.30/128,965.82
6. Step 6: Final answer
   x = 164,682.67