Finding the Fourth Proportional to 105,371,689.62, 158,056,647.75 and 82,361,978.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,371,689.62 : 158,056,647.75 = 82,361,978.31 : x
2. Step 2: Convert to fraction form
   105,371,689.62/158,056,647.75 = 82,361,978.31/x
3. Step 3: Cross multiply
   105,371,689.62x = 158,056,647.75 × 82,361,978.31
4. Step 4: Simplify right side
   105,371,689.62x = 13,017,858,193,736,810
5. Step 5: Solve for x
   x = 13,017,858,193,736,810/105,371,689.62
6. Step 6: Final answer
   x = 123,542,274.41