Finding the Fourth Proportional to 81,784.40, 122,788.92 and 42,368.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,784.40 : 122,788.92 = 42,368.72 : x
2. Step 2: Convert to fraction form
   81,784.40/122,788.92 = 42,368.72/x
3. Step 3: Cross multiply
   81,784.40x = 122,788.92 × 42,368.72
4. Step 4: Simplify right side
   81,784.40x = 5,202,409,370.58
5. Step 5: Solve for x
   x = 5,202,409,370.58/81,784.40
6. Step 6: Final answer
   x = 63,611.27