Finding the Fourth Proportional to 37,978.47, 56,905.23 and 13,004.75

Step by Step Solution

1. Step 1: Write the proportion equation
   37,978.47 : 56,905.23 = 13,004.75 : x
2. Step 2: Convert to fraction form
   37,978.47/56,905.23 = 13,004.75/x
3. Step 3: Cross multiply
   37,978.47x = 56,905.23 × 13,004.75
4. Step 4: Simplify right side
   37,978.47x = 740,038,480.87
5. Step 5: Solve for x
   x = 740,038,480.87/37,978.47
6. Step 6: Final answer
   x = 19,485.74