Finding the Third Proportional to 49,990.50 and 83,328.75

Step by Step Solution

1. Step 1: Write the proportion equation
   49,990.50 : 83,328.75 = 83,328.75 : x
2. Step 2: Convert to fraction form
   49,990.50/83,328.75 = 83,328.75/x
3. Step 3: Cross multiply
   49,990.50x = 83,328.75 × 83,328.75
4. Step 4: Simplify right side
   49,990.50x = 6,943,680,576.56
5. Step 5: Solve for x
   x = 6,943,680,576.56/49,990.50
6. Step 6: Final answer
   x = 138,900.00