Finding the Fourth Proportional to 76,159.15, 105,103.52 and 42,171.40

Step by Step Solution

1. Step 1: Write the proportion equation
   76,159.15 : 105,103.52 = 42,171.40 : x
2. Step 2: Convert to fraction form
   76,159.15/105,103.52 = 42,171.40/x
3. Step 3: Cross multiply
   76,159.15x = 105,103.52 × 42,171.40
4. Step 4: Simplify right side
   76,159.15x = 4,432,362,543.39
5. Step 5: Solve for x
   x = 4,432,362,543.39/76,159.15
6. Step 6: Final answer
   x = 58,198.68