Finding the Fourth Proportional to 206,519.86, 309,279.60 and 105,050.96

Step by Step Solution

1. Step 1: Write the proportion equation
   206,519.86 : 309,279.60 = 105,050.96 : x
2. Step 2: Convert to fraction form
   206,519.86/309,279.60 = 105,050.96/x
3. Step 3: Cross multiply
   206,519.86x = 309,279.60 × 105,050.96
4. Step 4: Simplify right side
   206,519.86x = 32,490,118,501.82
5. Step 5: Solve for x
   x = 32,490,118,501.82/206,519.86
6. Step 6: Final answer
   x = 157,322.00