Finding the Fourth Proportional to 79,317.31, 109,435.69 and 51,039.40

Step by Step Solution

1. Step 1: Write the proportion equation
   79,317.31 : 109,435.69 = 51,039.40 : x
2. Step 2: Convert to fraction form
   79,317.31/109,435.69 = 51,039.40/x
3. Step 3: Cross multiply
   79,317.31x = 109,435.69 × 51,039.40
4. Step 4: Simplify right side
   79,317.31x = 5,585,531,956.19
5. Step 5: Solve for x
   x = 5,585,531,956.19/79,317.31
6. Step 6: Final answer
   x = 70,420.09