Finding the Fourth Proportional to 72,728.40, 109,150.86 and 37,678.08

Step by Step Solution

1. Step 1: Write the proportion equation
   72,728.40 : 109,150.86 = 37,678.08 : x
2. Step 2: Convert to fraction form
   72,728.40/109,150.86 = 37,678.08/x
3. Step 3: Cross multiply
   72,728.40x = 109,150.86 × 37,678.08
4. Step 4: Simplify right side
   72,728.40x = 4,112,594,835.15
5. Step 5: Solve for x
   x = 4,112,594,835.15/72,728.40
6. Step 6: Final answer
   x = 56,547.30