Finding the Fourth Proportional to 76,290.14, 105,279.88 and 42,298.63

Step by Step Solution

1. Step 1: Write the proportion equation
   76,290.14 : 105,279.88 = 42,298.63 : x
2. Step 2: Convert to fraction form
   76,290.14/105,279.88 = 42,298.63/x
3. Step 3: Cross multiply
   76,290.14x = 105,279.88 × 42,298.63
4. Step 4: Simplify right side
   76,290.14x = 4,453,194,690.56
5. Step 5: Solve for x
   x = 4,453,194,690.56/76,290.14
6. Step 6: Final answer
   x = 58,371.82