Finding the Fourth Proportional to 76,298.83, 105,292.61 and 42,309.71

Step by Step Solution

1. Step 1: Write the proportion equation
   76,298.83 : 105,292.61 = 42,309.71 : x
2. Step 2: Convert to fraction form
   76,298.83/105,292.61 = 42,309.71/x
3. Step 3: Cross multiply
   76,298.83x = 105,292.61 × 42,309.71
4. Step 4: Simplify right side
   76,298.83x = 4,454,899,609.74
5. Step 5: Solve for x
   x = 4,454,899,609.74/76,298.83
6. Step 6: Final answer
   x = 58,387.52