Finding the Fourth Proportional to 90,172.72, 124,427.59 and 49,881.02

Step by Step Solution

1. Step 1: Write the proportion equation
   90,172.72 : 124,427.59 = 49,881.02 : x
2. Step 2: Convert to fraction form
   90,172.72/124,427.59 = 49,881.02/x
3. Step 3: Cross multiply
   90,172.72x = 124,427.59 × 49,881.02
4. Step 4: Simplify right side
   90,172.72x = 6,206,575,105.34
5. Step 5: Solve for x
   x = 6,206,575,105.34/90,172.72
6. Step 6: Final answer
   x = 68,829.85