Finding the Fourth Proportional to 91,749.30, 137,648.55 and 73,099.65

Step by Step Solution

1. Step 1: Write the proportion equation
   91,749.30 : 137,648.55 = 73,099.65 : x
2. Step 2: Convert to fraction form
   91,749.30/137,648.55 = 73,099.65/x
3. Step 3: Cross multiply
   91,749.30x = 137,648.55 × 73,099.65
4. Step 4: Simplify right side
   91,749.30x = 10,062,060,828.01
5. Step 5: Solve for x
   x = 10,062,060,828.01/91,749.30
6. Step 6: Final answer
   x = 109,669.07