Finding the Fourth Proportional to 216,101.82, 298,259.54 and 128,892.51

Step by Step Solution

1. Step 1: Write the proportion equation
   216,101.82 : 298,259.54 = 128,892.51 : x
2. Step 2: Convert to fraction form
   216,101.82/298,259.54 = 128,892.51/x
3. Step 3: Cross multiply
   216,101.82x = 298,259.54 × 128,892.51
4. Step 4: Simplify right side
   216,101.82x = 38,443,420,104.59
5. Step 5: Solve for x
   x = 38,443,420,104.59/216,101.82
6. Step 6: Final answer
   x = 177,894.94