Finding the Fourth Proportional to 105,243, 156,511.16 and 101,920.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,243 : 156,511.16 = 101,920.56 : x
2. Step 2: Convert to fraction form
   105,243/156,511.16 = 101,920.56/x
3. Step 3: Cross multiply
   105,243x = 156,511.16 × 101,920.56
4. Step 4: Simplify right side
   105,243x = 15,951,705,073.45
5. Step 5: Solve for x
   x = 15,951,705,073.45/105,243
6. Step 6: Final answer
   x = 151,570.22