Finding the Third Proportional to 78,090,426,485 and 109,968,528,451

Step by Step Solution

1. Step 1: Write the proportion equation
   78,090,426,485 : 109,968,528,451 = 109,968,528,451 : x
2. Step 2: Convert to fraction form
   78,090,426,485/109,968,528,451 = 109,968,528,451/x
3. Step 3: Cross multiply
   78,090,426,485x = 109,968,528,451 × 109,968,528,451
4. Step 4: Simplify right side
   78,090,426,485x = 12,093,077,249,678,395,834,368
5. Step 5: Solve for x
   x = 12,093,077,249,678,395,834,368/78,090,426,485
6. Step 6: Final answer
   x = 154,859,920,658.79