Finding the Fourth Proportional to 191,408.69, 264,139.32 and 105,366.89

Step by Step Solution

1. Step 1: Write the proportion equation
   191,408.69 : 264,139.32 = 105,366.89 : x
2. Step 2: Convert to fraction form
   191,408.69/264,139.32 = 105,366.89/x
3. Step 3: Cross multiply
   191,408.69x = 264,139.32 × 105,366.89
4. Step 4: Simplify right side
   191,408.69x = 27,831,537,354.42
5. Step 5: Solve for x
   x = 27,831,537,354.42/191,408.69
6. Step 6: Final answer
   x = 145,403.73