Finding the Fourth Proportional to 215,978.63, 298,058.69 and 120,503.93

Step by Step Solution

1. Step 1: Write the proportion equation
   215,978.63 : 298,058.69 = 120,503.93 : x
2. Step 2: Convert to fraction form
   215,978.63/298,058.69 = 120,503.93/x
3. Step 3: Cross multiply
   215,978.63x = 298,058.69 × 120,503.93
4. Step 4: Simplify right side
   215,978.63x = 35,917,241,422.84
5. Step 5: Solve for x
   x = 35,917,241,422.84/215,978.63
6. Step 6: Final answer
   x = 166,299.98