Finding the Fourth Proportional to 72,905.38, 99,953.27 and 71,576.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,905.38 : 99,953.27 = 71,576.78 : x
2. Step 2: Convert to fraction form
   72,905.38/99,953.27 = 71,576.78/x
3. Step 3: Cross multiply
   72,905.38x = 99,953.27 × 71,576.78
4. Step 4: Simplify right side
   72,905.38x = 7,154,333,217.07
5. Step 5: Solve for x
   x = 7,154,333,217.07/72,905.38
6. Step 6: Final answer
   x = 98,131.76