Finding the Fourth Proportional to 139,968,111.83, 209,952,167.74 and 128,914,139.03

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,111.83 : 209,952,167.74 = 128,914,139.03 : x
2. Step 2: Convert to fraction form
   139,968,111.83/209,952,167.74 = 128,914,139.03/x
3. Step 3: Cross multiply
   139,968,111.83x = 209,952,167.74 × 128,914,139.03
4. Step 4: Simplify right side
   139,968,111.83x = 27,065,802,940,312,196
5. Step 5: Solve for x
   x = 27,065,802,940,312,196/139,968,111.83
6. Step 6: Final answer
   x = 193,371,208.54