Finding the Fourth Proportional to 58,320, 87,492.96 and 21,384

Step by Step Solution

1. Step 1: Write the proportion equation
   58,320 : 87,492.96 = 21,384 : x
2. Step 2: Convert to fraction form
   58,320/87,492.96 = 21,384/x
3. Step 3: Cross multiply
   58,320x = 87,492.96 × 21,384
4. Step 4: Simplify right side
   58,320x = 1,870,949,456.64
5. Step 5: Solve for x
   x = 1,870,949,456.64/58,320
6. Step 6: Final answer
   x = 32,080.75