Finding the Fourth Proportional to 39,047.72, 58,659.90 and 27,978.92

Step by Step Solution

1. Step 1: Write the proportion equation
   39,047.72 : 58,659.90 = 27,978.92 : x
2. Step 2: Convert to fraction form
   39,047.72/58,659.90 = 27,978.92/x
3. Step 3: Cross multiply
   39,047.72x = 58,659.90 × 27,978.92
4. Step 4: Simplify right side
   39,047.72x = 1,641,240,649.31
5. Step 5: Solve for x
   x = 1,641,240,649.31/39,047.72
6. Step 6: Final answer
   x = 42,031.66