Finding the Fourth Proportional to 56,578.80, 84,848.52 and 28,488

Step by Step Solution

1. Step 1: Write the proportion equation
   56,578.80 : 84,848.52 = 28,488 : x
2. Step 2: Convert to fraction form
   56,578.80/84,848.52 = 28,488/x
3. Step 3: Cross multiply
   56,578.80x = 84,848.52 × 28,488
4. Step 4: Simplify right side
   56,578.80x = 2,417,164,637.76
5. Step 5: Solve for x
   x = 2,417,164,637.76/56,578.80
6. Step 6: Final answer
   x = 42,722.09