Finding the Fourth Proportional to 195,515.78, 293,384.52 and 105,557.30

Step by Step Solution

1. Step 1: Write the proportion equation
   195,515.78 : 293,384.52 = 105,557.30 : x
2. Step 2: Convert to fraction form
   195,515.78/293,384.52 = 105,557.30/x
3. Step 3: Cross multiply
   195,515.78x = 293,384.52 × 105,557.30
4. Step 4: Simplify right side
   195,515.78x = 30,968,877,793.00
5. Step 5: Solve for x
   x = 30,968,877,793.00/195,515.78
6. Step 6: Final answer
   x = 158,395.80