Finding the Third Proportional to 12,926,388 and 19,658,178

Step by Step Solution

1. Step 1: Write the proportion equation
   12,926,388 : 19,658,178 = 19,658,178 : x
2. Step 2: Convert to fraction form
   12,926,388/19,658,178 = 19,658,178/x
3. Step 3: Cross multiply
   12,926,388x = 19,658,178 × 19,658,178
4. Step 4: Simplify right side
   12,926,388x = 386,443,962,279,684
5. Step 5: Solve for x
   x = 386,443,962,279,684/12,926,388
6. Step 6: Final answer
   x = 29,895,742.13