Finding the Fourth Proportional to 105,435.48, 157,978.25 and 74,205.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,435.48 : 157,978.25 = 74,205.12 : x
2. Step 2: Convert to fraction form
   105,435.48/157,978.25 = 74,205.12/x
3. Step 3: Cross multiply
   105,435.48x = 157,978.25 × 74,205.12
4. Step 4: Simplify right side
   105,435.48x = 11,722,793,837.72
5. Step 5: Solve for x
   x = 11,722,793,837.72/105,435.48
6. Step 6: Final answer
   x = 111,184.53