Finding the Fourth Proportional to 76,538.28, 105,619.53 and 42,546.69

Step by Step Solution

1. Step 1: Write the proportion equation
   76,538.28 : 105,619.53 = 42,546.69 : x
2. Step 2: Convert to fraction form
   76,538.28/105,619.53 = 42,546.69/x
3. Step 3: Cross multiply
   76,538.28x = 105,619.53 × 42,546.69
4. Step 4: Simplify right side
   76,538.28x = 4,493,761,400.86
5. Step 5: Solve for x
   x = 4,493,761,400.86/76,538.28
6. Step 6: Final answer
   x = 58,712.60