Finding the Fourth Proportional to 78,585.36, 108,445.50 and 42,774.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,585.36 : 108,445.50 = 42,774.54 : x
2. Step 2: Convert to fraction form
   78,585.36/108,445.50 = 42,774.54/x
3. Step 3: Cross multiply
   78,585.36x = 108,445.50 × 42,774.54
4. Step 4: Simplify right side
   78,585.36x = 4,638,706,377.57
5. Step 5: Solve for x
   x = 4,638,706,377.57/78,585.36
6. Step 6: Final answer
   x = 59,027.62