Finding the Fourth Proportional to 120,693.89, 181,160.01 and 90,603.51

Step by Step Solution

1. Step 1: Write the proportion equation
   120,693.89 : 181,160.01 = 90,603.51 : x
2. Step 2: Convert to fraction form
   120,693.89/181,160.01 = 90,603.51/x
3. Step 3: Cross multiply
   120,693.89x = 181,160.01 × 90,603.51
4. Step 4: Simplify right side
   120,693.89x = 16,413,732,522.99
5. Step 5: Solve for x
   x = 16,413,732,522.99/120,693.89
6. Step 6: Final answer
   x = 135,994.72