Finding the Fourth Proportional to 215,997.50, 298,075.74 and 120,498.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,997.50 : 298,075.74 = 120,498.50 : x
2. Step 2: Convert to fraction form
   215,997.50/298,075.74 = 120,498.50/x
3. Step 3: Cross multiply
   215,997.50x = 298,075.74 × 120,498.50
4. Step 4: Simplify right side
   215,997.50x = 35,917,679,556.39
5. Step 5: Solve for x
   x = 35,917,679,556.39/215,997.50
6. Step 6: Final answer
   x = 166,287.48