Finding the Fourth Proportional to 79,978.74, 120,005.20 and 34,994.17

Step by Step Solution

1. Step 1: Write the proportion equation
   79,978.74 : 120,005.20 = 34,994.17 : x
2. Step 2: Convert to fraction form
   79,978.74/120,005.20 = 34,994.17/x
3. Step 3: Cross multiply
   79,978.74x = 120,005.20 × 34,994.17
4. Step 4: Simplify right side
   79,978.74x = 4,199,482,369.68
5. Step 5: Solve for x
   x = 4,199,482,369.68/79,978.74
6. Step 6: Final answer
   x = 52,507.48