Finding the Fourth Proportional to 300,686.50, 451,056.39 and 79,070.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,686.50 : 451,056.39 = 79,070.50 : x
2. Step 2: Convert to fraction form
   300,686.50/451,056.39 = 79,070.50/x
3. Step 3: Cross multiply
   300,686.50x = 451,056.39 × 79,070.50
4. Step 4: Simplify right side
   300,686.50x = 35,665,254,285.50
5. Step 5: Solve for x
   x = 35,665,254,285.50/300,686.50
6. Step 6: Final answer
   x = 118,612.76