Finding the Fourth Proportional to 59,434.20, 89,148.06 and 19,987.20

Step by Step Solution

1. Step 1: Write the proportion equation
   59,434.20 : 89,148.06 = 19,987.20 : x
2. Step 2: Convert to fraction form
   59,434.20/89,148.06 = 19,987.20/x
3. Step 3: Cross multiply
   59,434.20x = 89,148.06 × 19,987.20
4. Step 4: Simplify right side
   59,434.20x = 1,781,820,104.83
5. Step 5: Solve for x
   x = 1,781,820,104.83/59,434.20
6. Step 6: Final answer
   x = 29,979.71