Finding the Fourth Proportional to 191,659.43, 264,491.75 and 105,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,659.43 : 264,491.75 = 105,621.50 : x
2. Step 2: Convert to fraction form
   191,659.43/264,491.75 = 105,621.50/x
3. Step 3: Cross multiply
   191,659.43x = 264,491.75 × 105,621.50
4. Step 4: Simplify right side
   191,659.43x = 27,936,014,314.22
5. Step 5: Solve for x
   x = 27,936,014,314.22/191,659.43
6. Step 6: Final answer
   x = 145,758.63