Finding the Fourth Proportional to 309,611.72, 464,407.86 and 87,995.72

Step by Step Solution

1. Step 1: Write the proportion equation
   309,611.72 : 464,407.86 = 87,995.72 : x
2. Step 2: Convert to fraction form
   309,611.72/464,407.86 = 87,995.72/x
3. Step 3: Cross multiply
   309,611.72x = 464,407.86 × 87,995.72
4. Step 4: Simplify right side
   309,611.72x = 40,865,904,014.36
5. Step 5: Solve for x
   x = 40,865,904,014.36/309,611.72
6. Step 6: Final answer
   x = 131,990.82