Finding the Fourth Proportional to 215,915.98, 297,964.45 and 120,428.83

Step by Step Solution

1. Step 1: Write the proportion equation
   215,915.98 : 297,964.45 = 120,428.83 : x
2. Step 2: Convert to fraction form
   215,915.98/297,964.45 = 120,428.83/x
3. Step 3: Cross multiply
   215,915.98x = 297,964.45 × 120,428.83
4. Step 4: Simplify right side
   215,915.98x = 35,883,508,603.33
5. Step 5: Solve for x
   x = 35,883,508,603.33/215,915.98
6. Step 6: Final answer
   x = 166,192.00