Finding the Fourth Proportional to 76,279.86, 105,264.84 and 42,288.18

Step by Step Solution

1. Step 1: Write the proportion equation
   76,279.86 : 105,264.84 = 42,288.18 : x
2. Step 2: Convert to fraction form
   76,279.86/105,264.84 = 42,288.18/x
3. Step 3: Cross multiply
   76,279.86x = 105,264.84 × 42,288.18
4. Step 4: Simplify right side
   76,279.86x = 4,451,458,501.59
5. Step 5: Solve for x
   x = 4,451,458,501.59/76,279.86
6. Step 6: Final answer
   x = 58,356.93