Finding the Fourth Proportional to 105,516, 158,256.72 and 74,256.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,516 : 158,256.72 = 74,256.48 : x
2. Step 2: Convert to fraction form
   105,516/158,256.72 = 74,256.48/x
3. Step 3: Cross multiply
   105,516x = 158,256.72 × 74,256.48
4. Step 4: Simplify right side
   105,516x = 11,751,586,963.55
5. Step 5: Solve for x
   x = 11,751,586,963.55/105,516
6. Step 6: Final answer
   x = 111,372.56