Finding the Fourth Proportional to 139,968,488.10, 209,952,732.15 and 136,982,504.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,488.10 : 209,952,732.15 = 136,982,504.10 : x
2. Step 2: Convert to fraction form
   139,968,488.10/209,952,732.15 = 136,982,504.10/x
3. Step 3: Cross multiply
   139,968,488.10x = 209,952,732.15 × 136,982,504.10
4. Step 4: Simplify right side
   139,968,488.10x = 28,759,850,992,543,576
5. Step 5: Solve for x
   x = 28,759,850,992,543,576/139,968,488.10
6. Step 6: Final answer
   x = 205,473,756.15