Finding the Fourth Proportional to 139,968,116.45, 209,952,174.68 and 139,968,116.45

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,116.45 : 209,952,174.68 = 139,968,116.45 : x
2. Step 2: Convert to fraction form
   139,968,116.45/209,952,174.68 = 139,968,116.45/x
3. Step 3: Cross multiply
   139,968,116.45x = 209,952,174.68 × 139,968,116.45
4. Step 4: Simplify right side
   139,968,116.45x = 29,386,610,434,540,980
5. Step 5: Solve for x
   x = 29,386,610,434,540,980/139,968,116.45
6. Step 6: Final answer
   x = 209,952,174.68