Finding the Fourth Proportional to 78,398.50, 117,560.71 and 30,389.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,398.50 : 117,560.71 = 30,389.59 : x
2. Step 2: Convert to fraction form
   78,398.50/117,560.71 = 30,389.59/x
3. Step 3: Cross multiply
   78,398.50x = 117,560.71 × 30,389.59
4. Step 4: Simplify right side
   78,398.50x = 3,572,621,625.06
5. Step 5: Solve for x
   x = 3,572,621,625.06/78,398.50
6. Step 6: Final answer
   x = 45,570.03