Finding the Fourth Proportional to 613,131.30, 846,194.88 and 371,406.78

Step by Step Solution

1. Step 1: Write the proportion equation
   613,131.30 : 846,194.88 = 371,406.78 : x
2. Step 2: Convert to fraction form
   613,131.30/846,194.88 = 371,406.78/x
3. Step 3: Cross multiply
   613,131.30x = 846,194.88 × 371,406.78
4. Step 4: Simplify right side
   613,131.30x = 314,282,515,633.29
5. Step 5: Solve for x
   x = 314,282,515,633.29/613,131.30
6. Step 6: Final answer
   x = 512,585.99