Finding the Fourth Proportional to 380,111.48, 570,274.86 and 190,342.76

Step by Step Solution

1. Step 1: Write the proportion equation
   380,111.48 : 570,274.86 = 190,342.76 : x
2. Step 2: Convert to fraction form
   380,111.48/570,274.86 = 190,342.76/x
3. Step 3: Cross multiply
   380,111.48x = 570,274.86 × 190,342.76
4. Step 4: Simplify right side
   380,111.48x = 108,547,690,811.01
5. Step 5: Solve for x
   x = 108,547,690,811.01/380,111.48
6. Step 6: Final answer
   x = 285,568.04