Finding the Fourth Proportional to 78,415.28, 108,213.53 and 42,605.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,415.28 : 108,213.53 = 42,605.58 : x
2. Step 2: Convert to fraction form
   78,415.28/108,213.53 = 42,605.58/x
3. Step 3: Cross multiply
   78,415.28x = 108,213.53 × 42,605.58
4. Step 4: Simplify right side
   78,415.28x = 4,610,500,209.50
5. Step 5: Solve for x
   x = 4,610,500,209.50/78,415.28
6. Step 6: Final answer
   x = 58,795.94