Finding the Fourth Proportional to 76,481.61, 105,561.48 and 42,501.75

Step by Step Solution

1. Step 1: Write the proportion equation
   76,481.61 : 105,561.48 = 42,501.75 : x
2. Step 2: Convert to fraction form
   76,481.61/105,561.48 = 42,501.75/x
3. Step 3: Cross multiply
   76,481.61x = 105,561.48 × 42,501.75
4. Step 4: Simplify right side
   76,481.61x = 4,486,547,632.59
5. Step 5: Solve for x
   x = 4,486,547,632.59/76,481.61
6. Step 6: Final answer
   x = 58,661.78