Finding the Fourth Proportional to 215,799.05, 297,930.42 and 191,859.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,799.05 : 297,930.42 = 191,859.50 : x
2. Step 2: Convert to fraction form
   215,799.05/297,930.42 = 191,859.50/x
3. Step 3: Cross multiply
   215,799.05x = 297,930.42 × 191,859.50
4. Step 4: Simplify right side
   215,799.05x = 57,160,779,926.34
5. Step 5: Solve for x
   x = 57,160,779,926.34/215,799.05
6. Step 6: Final answer
   x = 264,879.67