Finding the Fourth Proportional to 216,131.60, 298,259.88 and 120,635.30

Step by Step Solution

1. Step 1: Write the proportion equation
   216,131.60 : 298,259.88 = 120,635.30 : x
2. Step 2: Convert to fraction form
   216,131.60/298,259.88 = 120,635.30/x
3. Step 3: Cross multiply
   216,131.60x = 298,259.88 × 120,635.30
4. Step 4: Simplify right side
   216,131.60x = 35,980,670,101.76
5. Step 5: Solve for x
   x = 35,980,670,101.76/216,131.60
6. Step 6: Final answer
   x = 166,475.75