Finding the Fourth Proportional to 139,968,128.55, 209,952,192.83 and 139,968,128.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,128.55 : 209,952,192.83 = 139,968,128.55 : x
2. Step 2: Convert to fraction form
   139,968,128.55/209,952,192.83 = 139,968,128.55/x
3. Step 3: Cross multiply
   139,968,128.55x = 209,952,192.83 × 139,968,128.55
4. Step 4: Simplify right side
   139,968,128.55x = 29,386,615,514,683,988
5. Step 5: Solve for x
   x = 29,386,615,514,683,988/139,968,128.55
6. Step 6: Final answer
   x = 209,952,192.83