Finding the Fourth Proportional to 112,846.05, 155,777.14 and 78,987.48

Step by Step Solution

1. Step 1: Write the proportion equation
   112,846.05 : 155,777.14 = 78,987.48 : x
2. Step 2: Convert to fraction form
   112,846.05/155,777.14 = 78,987.48/x
3. Step 3: Cross multiply
   112,846.05x = 155,777.14 × 78,987.48
4. Step 4: Simplify right side
   112,846.05x = 12,304,443,244.78
5. Step 5: Solve for x
   x = 12,304,443,244.78/112,846.05
6. Step 6: Final answer
   x = 109,037.43