Finding the Fourth Proportional to 268,434,123, 370,433,283.59 and 155,408,381.21

Step by Step Solution

1. Step 1: Write the proportion equation
   268,434,123 : 370,433,283.59 = 155,408,381.21 : x
2. Step 2: Convert to fraction form
   268,434,123/370,433,283.59 = 155,408,381.21/x
3. Step 3: Cross multiply
   268,434,123x = 370,433,283.59 × 155,408,381.21
4. Step 4: Simplify right side
   268,434,123x = 57,568,436,949,026,760
5. Step 5: Solve for x
   x = 57,568,436,949,026,760/268,434,123
6. Step 6: Final answer
   x = 214,460,204.63