Finding the Fourth Proportional to 196,948,494.88, 271,826,478.72 and 129,849,640

Step by Step Solution

1. Step 1: Write the proportion equation
   196,948,494.88 : 271,826,478.72 = 129,849,640 : x
2. Step 2: Convert to fraction form
   196,948,494.88/271,826,478.72 = 129,849,640/x
3. Step 3: Cross multiply
   196,948,494.88x = 271,826,478.72 × 129,849,640
4. Step 4: Simplify right side
   196,948,494.88x = 35,296,570,404,259,664
5. Step 5: Solve for x
   x = 35,296,570,404,259,664/196,948,494.88
6. Step 6: Final answer
   x = 179,217,264.01