Finding the Fourth Proportional to 861,706.71, 1,293,150.51 and 300,741.21

Step by Step Solution

1. Step 1: Write the proportion equation
   861,706.71 : 1,293,150.51 = 300,741.21 : x
2. Step 2: Convert to fraction form
   861,706.71/1,293,150.51 = 300,741.21/x
3. Step 3: Cross multiply
   861,706.71x = 1,293,150.51 × 300,741.21
4. Step 4: Simplify right side
   861,706.71x = 388,903,649,089.52
5. Step 5: Solve for x
   x = 388,903,649,089.52/861,706.71
6. Step 6: Final answer
   x = 451,317.88