Finding the Fourth Proportional to 139,968,111.70, 209,952,167.55 and 139,968,111.70

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,111.70 : 209,952,167.55 = 139,968,111.70 : x
2. Step 2: Convert to fraction form
   139,968,111.70/209,952,167.55 = 139,968,111.70/x
3. Step 3: Cross multiply
   139,968,111.70x = 209,952,167.55 × 139,968,111.70
4. Step 4: Simplify right side
   139,968,111.70x = 29,386,608,439,295,516
5. Step 5: Solve for x
   x = 29,386,608,439,295,516/139,968,111.70
6. Step 6: Final answer
   x = 209,952,167.55