Finding the Fourth Proportional to 105,261.98, 158,005.32 and 45,320.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,261.98 : 158,005.32 = 45,320.12 : x
2. Step 2: Convert to fraction form
   105,261.98/158,005.32 = 45,320.12/x
3. Step 3: Cross multiply
   105,261.98x = 158,005.32 × 45,320.12
4. Step 4: Simplify right side
   105,261.98x = 7,160,820,063.04
5. Step 5: Solve for x
   x = 7,160,820,063.04/105,261.98
6. Step 6: Final answer
   x = 68,028.55