Finding the Fourth Proportional to 72,460.44, 108,690.72 and 19,870.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72,460.44 : 108,690.72 = 19,870.32 : x
2. Step 2: Convert to fraction form
   72,460.44/108,690.72 = 19,870.32/x
3. Step 3: Cross multiply
   72,460.44x = 108,690.72 × 19,870.32
4. Step 4: Simplify right side
   72,460.44x = 2,159,719,387.43
5. Step 5: Solve for x
   x = 2,159,719,387.43/72,460.44
6. Step 6: Final answer
   x = 29,805.50