Finding the Fourth Proportional to 139,968,009.85, 209,574,101.18 and 139,968,009.85

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,009.85 : 209,574,101.18 = 139,968,009.85 : x
2. Step 2: Convert to fraction form
   139,968,009.85/209,574,101.18 = 139,968,009.85/x
3. Step 3: Cross multiply
   139,968,009.85x = 209,574,101.18 × 139,968,009.85
4. Step 4: Simplify right side
   139,968,009.85x = 29,333,669,857,567,296
5. Step 5: Solve for x
   x = 29,333,669,857,567,296/139,968,009.85
6. Step 6: Final answer
   x = 209,574,101.18