Finding the Fourth Proportional to 152,239.89, 210,089.50 and 84,257

Step by Step Solution

1. Step 1: Write the proportion equation
   152,239.89 : 210,089.50 = 84,257 : x
2. Step 2: Convert to fraction form
   152,239.89/210,089.50 = 84,257/x
3. Step 3: Cross multiply
   152,239.89x = 210,089.50 × 84,257
4. Step 4: Simplify right side
   152,239.89x = 17,701,511,001.50
5. Step 5: Solve for x
   x = 17,701,511,001.50/152,239.89
6. Step 6: Final answer
   x = 116,273.80