Finding the Third Proportional to 59,118,742.50 and 138,128,064

Step by Step Solution

1. Step 1: Write the proportion equation
   59,118,742.50 : 138,128,064 = 138,128,064 : x
2. Step 2: Convert to fraction form
   59,118,742.50/138,128,064 = 138,128,064/x
3. Step 3: Cross multiply
   59,118,742.50x = 138,128,064 × 138,128,064
4. Step 4: Simplify right side
   59,118,742.50x = 19,079,362,064,388,096
5. Step 5: Solve for x
   x = 19,079,362,064,388,096/59,118,742.50
6. Step 6: Final answer
   x = 322,729,497.58