Finding the Fourth Proportional to 78,315.66, 108,075.72 and 42,505.67

Step by Step Solution

1. Step 1: Write the proportion equation
   78,315.66 : 108,075.72 = 42,505.67 : x
2. Step 2: Convert to fraction form
   78,315.66/108,075.72 = 42,505.67/x
3. Step 3: Cross multiply
   78,315.66x = 108,075.72 × 42,505.67
4. Step 4: Simplify right side
   78,315.66x = 4,593,830,889.33
5. Step 5: Solve for x
   x = 4,593,830,889.33/78,315.66
6. Step 6: Final answer
   x = 58,657.88