Finding the Fourth Proportional to 271,994,771.88, 408,112,355.34 and 142,571,436.12

Step by Step Solution

1. Step 1: Write the proportion equation
   271,994,771.88 : 408,112,355.34 = 142,571,436.12 : x
2. Step 2: Convert to fraction form
   271,994,771.88/408,112,355.34 = 142,571,436.12/x
3. Step 3: Cross multiply
   271,994,771.88x = 408,112,355.34 × 142,571,436.12
4. Step 4: Simplify right side
   271,994,771.88x = 58,185,164,599,139,552
5. Step 5: Solve for x
   x = 58,185,164,599,139,552/271,994,771.88
6. Step 6: Final answer
   x = 213,920,158.09