Finding the Fourth Proportional to 215,925.78, 297,978.03 and 120,430.02

Step by Step Solution

1. Step 1: Write the proportion equation
   215,925.78 : 297,978.03 = 120,430.02 : x
2. Step 2: Convert to fraction form
   215,925.78/297,978.03 = 120,430.02/x
3. Step 3: Cross multiply
   215,925.78x = 297,978.03 × 120,430.02
4. Step 4: Simplify right side
   215,925.78x = 35,885,500,112.46
5. Step 5: Solve for x
   x = 35,885,500,112.46/215,925.78
6. Step 6: Final answer
   x = 166,193.68