Finding the Fourth Proportional to 402,111.94, 602,990.79 and 188,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,111.94 : 602,990.79 = 188,940.50 : x
2. Step 2: Convert to fraction form
   402,111.94/602,990.79 = 188,940.50/x
3. Step 3: Cross multiply
   402,111.94x = 602,990.79 × 188,940.50
4. Step 4: Simplify right side
   402,111.94x = 113,929,381,358.00
5. Step 5: Solve for x
   x = 113,929,381,358.00/402,111.94
6. Step 6: Final answer
   x = 283,327.53