Finding the Fourth Proportional to 91,799.90, 137,570.54 and 72,996.47

Step by Step Solution

1. Step 1: Write the proportion equation
   91,799.90 : 137,570.54 = 72,996.47 : x
2. Step 2: Convert to fraction form
   91,799.90/137,570.54 = 72,996.47/x
3. Step 3: Cross multiply
   91,799.90x = 137,570.54 × 72,996.47
4. Step 4: Simplify right side
   91,799.90x = 10,042,162,743.16
5. Step 5: Solve for x
   x = 10,042,162,743.16/91,799.90
6. Step 6: Final answer
   x = 109,391.88