Finding the Fourth Proportional to 78,485.08, 108,308.28 and 42,674.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,485.08 : 108,308.28 = 42,674.08 : x
2. Step 2: Convert to fraction form
   78,485.08/108,308.28 = 42,674.08/x
3. Step 3: Cross multiply
   78,485.08x = 108,308.28 × 42,674.08
4. Step 4: Simplify right side
   78,485.08x = 4,621,956,205.38
5. Step 5: Solve for x
   x = 4,621,956,205.38/78,485.08
6. Step 6: Final answer
   x = 58,889.62