Finding the Fourth Proportional to 78,480.03, 108,301.89 and 42,670.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,480.03 : 108,301.89 = 42,670.05 : x
2. Step 2: Convert to fraction form
   78,480.03/108,301.89 = 42,670.05/x
3. Step 3: Cross multiply
   78,480.03x = 108,301.89 × 42,670.05
4. Step 4: Simplify right side
   78,480.03x = 4,621,247,061.39
5. Step 5: Solve for x
   x = 4,621,247,061.39/78,480.03
6. Step 6: Final answer
   x = 58,884.37