Finding the Fourth Proportional to 210,978.72, 291,170.43 and 126,093.96

Step by Step Solution

1. Step 1: Write the proportion equation
   210,978.72 : 291,170.43 = 126,093.96 : x
2. Step 2: Convert to fraction form
   210,978.72/291,170.43 = 126,093.96/x
3. Step 3: Cross multiply
   210,978.72x = 291,170.43 × 126,093.96
4. Step 4: Simplify right side
   210,978.72x = 36,714,832,553.60
5. Step 5: Solve for x
   x = 36,714,832,553.60/210,978.72
6. Step 6: Final answer
   x = 174,021.50