Finding the Fourth Proportional to 102,498.89, 153,766.49 and 31,419.90

Step by Step Solution

1. Step 1: Write the proportion equation
   102,498.89 : 153,766.49 = 31,419.90 : x
2. Step 2: Convert to fraction form
   102,498.89/153,766.49 = 31,419.90/x
3. Step 3: Cross multiply
   102,498.89x = 153,766.49 × 31,419.90
4. Step 4: Simplify right side
   102,498.89x = 4,831,327,582.05
5. Step 5: Solve for x
   x = 4,831,327,582.05/102,498.89
6. Step 6: Final answer
   x = 47,135.42