Finding the Fourth Proportional to 191,681.45, 264,522.18 and 105,643.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,681.45 : 264,522.18 = 105,643.50 : x
2. Step 2: Convert to fraction form
   191,681.45/264,522.18 = 105,643.50/x
3. Step 3: Cross multiply
   191,681.45x = 264,522.18 × 105,643.50
4. Step 4: Simplify right side
   191,681.45x = 27,945,048,922.83
5. Step 5: Solve for x
   x = 27,945,048,922.83/191,681.45
6. Step 6: Final answer
   x = 145,789.01