Finding the Fourth Proportional to 82,786.86, 123,798.78 and 61,479.81

Step by Step Solution

1. Step 1: Write the proportion equation
   82,786.86 : 123,798.78 = 61,479.81 : x
2. Step 2: Convert to fraction form
   82,786.86/123,798.78 = 61,479.81/x
3. Step 3: Cross multiply
   82,786.86x = 123,798.78 × 61,479.81
4. Step 4: Simplify right side
   82,786.86x = 7,611,125,472.63
5. Step 5: Solve for x
   x = 7,611,125,472.63/82,786.86
6. Step 6: Final answer
   x = 91,936.40