Finding the Fourth Proportional to 37,978.16, 56,929.80 and 13,336.88

Step by Step Solution

1. Step 1: Write the proportion equation
   37,978.16 : 56,929.80 = 13,336.88 : x
2. Step 2: Convert to fraction form
   37,978.16/56,929.80 = 13,336.88/x
3. Step 3: Cross multiply
   37,978.16x = 56,929.80 × 13,336.88
4. Step 4: Simplify right side
   37,978.16x = 759,265,911.02
5. Step 5: Solve for x
   x = 759,265,911.02/37,978.16
6. Step 6: Final answer
   x = 19,992.17