Finding the Fourth Proportional to 139,968,015.35, 209,574,109.42 and 139,968,015.35

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,015.35 : 209,574,109.42 = 139,968,015.35 : x
2. Step 2: Convert to fraction form
   139,968,015.35/209,574,109.42 = 139,968,015.35/x
3. Step 3: Cross multiply
   139,968,015.35x = 209,574,109.42 × 139,968,015.35
4. Step 4: Simplify right side
   139,968,015.35x = 29,333,672,164,261,136
5. Step 5: Solve for x
   x = 29,333,672,164,261,136/139,968,015.35
6. Step 6: Final answer
   x = 209,574,109.42