Finding the Third Proportional to 72,678,367.50 and 111,711,684.75

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,367.50 : 111,711,684.75 = 111,711,684.75 : x
2. Step 2: Convert to fraction form
   72,678,367.50/111,711,684.75 = 111,711,684.75/x
3. Step 3: Cross multiply
   72,678,367.50x = 111,711,684.75 × 111,711,684.75
4. Step 4: Simplify right side
   72,678,367.50x = 12,479,500,509,683,382
5. Step 5: Solve for x
   x = 12,479,500,509,683,382/72,678,367.50
6. Step 6: Final answer
   x = 171,708,596.92