Finding the Fourth Proportional to 105,371,688.62, 158,056,646.25 and 82,361,977.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,371,688.62 : 158,056,646.25 = 82,361,977.31 : x
2. Step 2: Convert to fraction form
   105,371,688.62/158,056,646.25 = 82,361,977.31/x
3. Step 3: Cross multiply
   105,371,688.62x = 158,056,646.25 × 82,361,977.31
4. Step 4: Simplify right side
   105,371,688.62x = 13,017,857,912,137,196
5. Step 5: Solve for x
   x = 13,017,857,912,137,196/105,371,688.62
6. Step 6: Final answer
   x = 123,542,272.91