Finding the Fourth Proportional to 42,762.15, 58,973.30 and 27,638.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,762.15 : 58,973.30 = 27,638.91 : x
2. Step 2: Convert to fraction form
   42,762.15/58,973.30 = 27,638.91/x
3. Step 3: Cross multiply
   42,762.15x = 58,973.30 × 27,638.91
4. Step 4: Simplify right side
   42,762.15x = 1,629,957,298.04
5. Step 5: Solve for x
   x = 1,629,957,298.04/42,762.15
6. Step 6: Final answer
   x = 38,116.83