Finding the Fourth Proportional to 201,980.50, 278,731.59 and 111,336.55

Step by Step Solution

1. Step 1: Write the proportion equation
   201,980.50 : 278,731.59 = 111,336.55 : x
2. Step 2: Convert to fraction form
   201,980.50/278,731.59 = 111,336.55/x
3. Step 3: Cross multiply
   201,980.50x = 278,731.59 × 111,336.55
4. Step 4: Simplify right side
   201,980.50x = 31,033,013,606.61
5. Step 5: Solve for x
   x = 31,033,013,606.61/201,980.50
6. Step 6: Final answer
   x = 153,643.61