Finding the Fourth Proportional to 141,390.55, 195,117.59 and 105,253.60

Step by Step Solution

1. Step 1: Write the proportion equation
   141,390.55 : 195,117.59 = 105,253.60 : x
2. Step 2: Convert to fraction form
   141,390.55/195,117.59 = 105,253.60/x
3. Step 3: Cross multiply
   141,390.55x = 195,117.59 × 105,253.60
4. Step 4: Simplify right side
   141,390.55x = 20,536,828,770.82
5. Step 5: Solve for x
   x = 20,536,828,770.82/141,390.55
6. Step 6: Final answer
   x = 145,248.95