Finding the Fourth Proportional to 102,498.98, 153,770.75 and 31,421.89

Step by Step Solution

1. Step 1: Write the proportion equation
   102,498.98 : 153,770.75 = 31,421.89 : x
2. Step 2: Convert to fraction form
   102,498.98/153,770.75 = 31,421.89/x
3. Step 3: Cross multiply
   102,498.98x = 153,770.75 × 31,421.89
4. Step 4: Simplify right side
   102,498.98x = 4,831,766,665.75
5. Step 5: Solve for x
   x = 4,831,766,665.75/102,498.98
6. Step 6: Final answer
   x = 47,139.66