Finding the Fourth Proportional to 76,289.86, 105,279.99 and 42,298.24

Step by Step Solution

1. Step 1: Write the proportion equation
   76,289.86 : 105,279.99 = 42,298.24 : x
2. Step 2: Convert to fraction form
   76,289.86/105,279.99 = 42,298.24/x
3. Step 3: Cross multiply
   76,289.86x = 105,279.99 × 42,298.24
4. Step 4: Simplify right side
   76,289.86x = 4,453,158,284.22
5. Step 5: Solve for x
   x = 4,453,158,284.22/76,289.86
6. Step 6: Final answer
   x = 58,371.56