Finding the Fourth Proportional to 79,842.64, 119,729.32 and 42,394.56

Step by Step Solution

1. Step 1: Write the proportion equation
   79,842.64 : 119,729.32 = 42,394.56 : x
2. Step 2: Convert to fraction form
   79,842.64/119,729.32 = 42,394.56/x
3. Step 3: Cross multiply
   79,842.64x = 119,729.32 × 42,394.56
4. Step 4: Simplify right side
   79,842.64x = 5,075,871,840.50
5. Step 5: Solve for x
   x = 5,075,871,840.50/79,842.64
6. Step 6: Final answer
   x = 63,573.45