Finding the Fourth Proportional to 78,315.49, 108,075.47 and 42,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,315.49 : 108,075.47 = 42,505.50 : x
2. Step 2: Convert to fraction form
   78,315.49/108,075.47 = 42,505.50/x
3. Step 3: Cross multiply
   78,315.49x = 108,075.47 × 42,505.50
4. Step 4: Simplify right side
   78,315.49x = 4,593,801,890.09
5. Step 5: Solve for x
   x = 4,593,801,890.09/78,315.49
6. Step 6: Final answer
   x = 58,657.64