Finding the Fourth Proportional to 112,401.78, 155,146.77 and 74,189.22

Step by Step Solution

1. Step 1: Write the proportion equation
   112,401.78 : 155,146.77 = 74,189.22 : x
2. Step 2: Convert to fraction form
   112,401.78/155,146.77 = 74,189.22/x
3. Step 3: Cross multiply
   112,401.78x = 155,146.77 × 74,189.22
4. Step 4: Simplify right side
   112,401.78x = 11,510,217,851.82
5. Step 5: Solve for x
   x = 11,510,217,851.82/112,401.78
6. Step 6: Final answer
   x = 102,402.45