Finding the Fourth Proportional to 613,436.22, 920,342.12 and 314,128.71

Step by Step Solution

1. Step 1: Write the proportion equation
   613,436.22 : 920,342.12 = 314,128.71 : x
2. Step 2: Convert to fraction form
   613,436.22/920,342.12 = 314,128.71/x
3. Step 3: Cross multiply
   613,436.22x = 920,342.12 × 314,128.71
4. Step 4: Simplify right side
   613,436.22x = 289,105,882,914.27
5. Step 5: Solve for x
   x = 289,105,882,914.27/613,436.22
6. Step 6: Final answer
   x = 471,289.23