Finding the Fourth Proportional to 200,017.60, 275,894.22 and 128,284.00

Step by Step Solution

1. Step 1: Write the proportion equation
   200,017.60 : 275,894.22 = 128,284.00 : x
2. Step 2: Convert to fraction form
   200,017.60/275,894.22 = 128,284.00/x
3. Step 3: Cross multiply
   200,017.60x = 275,894.22 × 128,284.00
4. Step 4: Simplify right side
   200,017.60x = 35,392,812,739.01
5. Step 5: Solve for x
   x = 35,392,812,739.01/200,017.60
6. Step 6: Final answer
   x = 176,948.50