Finding the Fourth Proportional to 72,719.40, 109,137.36 and 37,669.08

Step by Step Solution

1. Step 1: Write the proportion equation
   72,719.40 : 109,137.36 = 37,669.08 : x
2. Step 2: Convert to fraction form
   72,719.40/109,137.36 = 37,669.08/x
3. Step 3: Cross multiply
   72,719.40x = 109,137.36 × 37,669.08
4. Step 4: Simplify right side
   72,719.40x = 4,111,103,944.83
5. Step 5: Solve for x
   x = 4,111,103,944.83/72,719.40
6. Step 6: Final answer
   x = 56,533.80