Finding the Fourth Proportional to 78,555.72, 117,763.86 and 28,626.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,555.72 : 117,763.86 = 28,626.50 : x
2. Step 2: Convert to fraction form
   78,555.72/117,763.86 = 28,626.50/x
3. Step 3: Cross multiply
   78,555.72x = 117,763.86 × 28,626.50
4. Step 4: Simplify right side
   78,555.72x = 3,371,167,138.29
5. Step 5: Solve for x
   x = 3,371,167,138.29/78,555.72
6. Step 6: Final answer
   x = 42,914.34