Finding the Fourth Proportional to 76,561.89, 105,655.74 and 42,573.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,561.89 : 105,655.74 = 42,573.48 : x
2. Step 2: Convert to fraction form
   76,561.89/105,655.74 = 42,573.48/x
3. Step 3: Cross multiply
   76,561.89x = 105,655.74 × 42,573.48
4. Step 4: Simplify right side
   76,561.89x = 4,498,132,533.78
5. Step 5: Solve for x
   x = 4,498,132,533.78/76,561.89
6. Step 6: Final answer
   x = 58,751.59