Finding the Fourth Proportional to 139,669,969.10, 209,504,953.65 and 139,669,969.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,669,969.10 : 209,504,953.65 = 139,669,969.10 : x
2. Step 2: Convert to fraction form
   139,669,969.10/209,504,953.65 = 139,669,969.10/x
3. Step 3: Cross multiply
   139,669,969.10x = 209,504,953.65 × 139,669,969.10
4. Step 4: Simplify right side
   139,669,969.10x = 29,261,550,402,592,432
5. Step 5: Solve for x
   x = 29,261,550,402,592,432/139,669,969.10
6. Step 6: Final answer
   x = 209,504,953.65