Finding the Fourth Proportional to 112,788.72, 155,648.36 and 61,804.62

Step by Step Solution

1. Step 1: Write the proportion equation
   112,788.72 : 155,648.36 = 61,804.62 : x
2. Step 2: Convert to fraction form
   112,788.72/155,648.36 = 61,804.62/x
3. Step 3: Cross multiply
   112,788.72x = 155,648.36 × 61,804.62
4. Step 4: Simplify right side
   112,788.72x = 9,619,787,434.40
5. Step 5: Solve for x
   x = 9,619,787,434.40/112,788.72
6. Step 6: Final answer
   x = 85,290.33