Finding the Fourth Proportional to 191,160.21, 263,807.72 and 105,122.72

Step by Step Solution

1. Step 1: Write the proportion equation
   191,160.21 : 263,807.72 = 105,122.72 : x
2. Step 2: Convert to fraction form
   191,160.21/263,807.72 = 105,122.72/x
3. Step 3: Cross multiply
   191,160.21x = 263,807.72 × 105,122.72
4. Step 4: Simplify right side
   191,160.21x = 27,732,183,238.75
5. Step 5: Solve for x
   x = 27,732,183,238.75/191,160.21
6. Step 6: Final answer
   x = 145,072.99