Finding the Fourth Proportional to 139,968,111.48, 209,952,167.21 and 139,968,111.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,111.48 : 209,952,167.21 = 139,968,111.48 : x
2. Step 2: Convert to fraction form
   139,968,111.48/209,952,167.21 = 139,968,111.48/x
3. Step 3: Cross multiply
   139,968,111.48x = 209,952,167.21 × 139,968,111.48
4. Step 4: Simplify right side
   139,968,111.48x = 29,386,608,345,516,880
5. Step 5: Solve for x
   x = 29,386,608,345,516,880/139,968,111.48
6. Step 6: Final answer
   x = 209,952,167.21