Finding the Fourth Proportional to 91,710.50, 137,362.50 and 70,494.30

Step by Step Solution

1. Step 1: Write the proportion equation
   91,710.50 : 137,362.50 = 70,494.30 : x
2. Step 2: Convert to fraction form
   91,710.50/137,362.50 = 70,494.30/x
3. Step 3: Cross multiply
   91,710.50x = 137,362.50 × 70,494.30
4. Step 4: Simplify right side
   91,710.50x = 9,683,273,283.75
5. Step 5: Solve for x
   x = 9,683,273,283.75/91,710.50
6. Step 6: Final answer
   x = 105,585.23