Finding the Fourth Proportional to 876,164.30, 1,209,079.60 and 494,185.58

Step by Step Solution

1. Step 1: Write the proportion equation
   876,164.30 : 1,209,079.60 = 494,185.58 : x
2. Step 2: Convert to fraction form
   876,164.30/1,209,079.60 = 494,185.58/x
3. Step 3: Cross multiply
   876,164.30x = 1,209,079.60 × 494,185.58
4. Step 4: Simplify right side
   876,164.30x = 597,509,696,111.31
5. Step 5: Solve for x
   x = 597,509,696,111.31/876,164.30
6. Step 6: Final answer
   x = 681,960.79