Finding the Fourth Proportional to 152,885.96, 210,959.78 and 85,805

Step by Step Solution

1. Step 1: Write the proportion equation
   152,885.96 : 210,959.78 = 85,805 : x
2. Step 2: Convert to fraction form
   152,885.96/210,959.78 = 85,805/x
3. Step 3: Cross multiply
   152,885.96x = 210,959.78 × 85,805
4. Step 4: Simplify right side
   152,885.96x = 18,101,403,922.90
5. Step 5: Solve for x
   x = 18,101,403,922.90/152,885.96
6. Step 6: Final answer
   x = 118,398.08