Finding the Fourth Proportional to 105,696.38, 145,870.18 and 57,959.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,696.38 : 145,870.18 = 57,959.04 : x
2. Step 2: Convert to fraction form
   105,696.38/145,870.18 = 57,959.04/x
3. Step 3: Cross multiply
   105,696.38x = 145,870.18 × 57,959.04
4. Step 4: Simplify right side
   105,696.38x = 8,454,495,597.43
5. Step 5: Solve for x
   x = 8,454,495,597.43/105,696.38
6. Step 6: Final answer
   x = 79,988.51