Finding the Fourth Proportional to 369,518.89, 554,106.06 and 191,978.23

Step by Step Solution

1. Step 1: Write the proportion equation
   369,518.89 : 554,106.06 = 191,978.23 : x
2. Step 2: Convert to fraction form
   369,518.89/554,106.06 = 191,978.23/x
3. Step 3: Cross multiply
   369,518.89x = 554,106.06 × 191,978.23
4. Step 4: Simplify right side
   369,518.89x = 106,376,300,631.07
5. Step 5: Solve for x
   x = 106,376,300,631.07/369,518.89
6. Step 6: Final answer
   x = 287,877.84