Finding the Fourth Proportional to 172,603,040.88, 258,902,789.88 and 99,773,480.52

Step by Step Solution

1. Step 1: Write the proportion equation
   172,603,040.88 : 258,902,789.88 = 99,773,480.52 : x
2. Step 2: Convert to fraction form
   172,603,040.88/258,902,789.88 = 99,773,480.52/x
3. Step 3: Cross multiply
   172,603,040.88x = 258,902,789.88 × 99,773,480.52
4. Step 4: Simplify right side
   172,603,040.88x = 25,831,632,462,665,832
5. Step 5: Solve for x
   x = 25,831,632,462,665,832/172,603,040.88
6. Step 6: Final answer
   x = 149,659,196.80