Finding the Fourth Proportional to 78,574.55, 108,429.30 and 42,764.45

Step by Step Solution

1. Step 1: Write the proportion equation
   78,574.55 : 108,429.30 = 42,764.45 : x
2. Step 2: Convert to fraction form
   78,574.55/108,429.30 = 42,764.45/x
3. Step 3: Cross multiply
   78,574.55x = 108,429.30 × 42,764.45
4. Step 4: Simplify right side
   78,574.55x = 4,636,918,836.24
5. Step 5: Solve for x
   x = 4,636,918,836.24/78,574.55
6. Step 6: Final answer
   x = 59,012.99