Finding the Fourth Proportional to 105,783.26, 158,669 and 77,349.34

Step by Step Solution

1. Step 1: Write the proportion equation
   105,783.26 : 158,669 = 77,349.34 : x
2. Step 2: Convert to fraction form
   105,783.26/158,669 = 77,349.34/x
3. Step 3: Cross multiply
   105,783.26x = 158,669 × 77,349.34
4. Step 4: Simplify right side
   105,783.26x = 12,272,942,428.46
5. Step 5: Solve for x
   x = 12,272,942,428.46/105,783.26
6. Step 6: Final answer
   x = 116,019.70