Finding the Fourth Proportional to 137,259, 205,500.12 and 87,215.04

Step by Step Solution

1. Step 1: Write the proportion equation
   137,259 : 205,500.12 = 87,215.04 : x
2. Step 2: Convert to fraction form
   137,259/205,500.12 = 87,215.04/x
3. Step 3: Cross multiply
   137,259x = 205,500.12 × 87,215.04
4. Step 4: Simplify right side
   137,259x = 17,922,701,185.80
5. Step 5: Solve for x
   x = 17,922,701,185.80/137,259
6. Step 6: Final answer
   x = 130,575.78