Finding the Fourth Proportional to 105,449.06, 145,368.32 and 75,181.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,449.06 : 145,368.32 = 75,181.83 : x
2. Step 2: Convert to fraction form
   105,449.06/145,368.32 = 75,181.83/x
3. Step 3: Cross multiply
   105,449.06x = 145,368.32 × 75,181.83
4. Step 4: Simplify right side
   105,449.06x = 10,929,056,321.63
5. Step 5: Solve for x
   x = 10,929,056,321.63/105,449.06
6. Step 6: Final answer
   x = 103,642.99