Finding the Fourth Proportional to 130,938.39, 196,493.67 and 71,815.55

Step by Step Solution

1. Step 1: Write the proportion equation
   130,938.39 : 196,493.67 = 71,815.55 : x
2. Step 2: Convert to fraction form
   130,938.39/196,493.67 = 71,815.55/x
3. Step 3: Cross multiply
   130,938.39x = 196,493.67 × 71,815.55
4. Step 4: Simplify right side
   130,938.39x = 14,111,300,000.10
5. Step 5: Solve for x
   x = 14,111,300,000.10/130,938.39
6. Step 6: Final answer
   x = 107,770.53