Finding the Fourth Proportional to 315,238,825.87, 472,448,032.72 and 128,274,837.34

Step by Step Solution

1. Step 1: Write the proportion equation
   315,238,825.87 : 472,448,032.72 = 128,274,837.34 : x
2. Step 2: Convert to fraction form
   315,238,825.87/472,448,032.72 = 128,274,837.34/x
3. Step 3: Cross multiply
   315,238,825.87x = 472,448,032.72 × 128,274,837.34
4. Step 4: Simplify right side
   315,238,825.87x = 60,603,194,548,761,000
5. Step 5: Solve for x
   x = 60,603,194,548,761,000/315,238,825.87
6. Step 6: Final answer
   x = 192,245,337.74