Finding the Third Proportional to 19,909,507,329 and 42,658,833,990

Step by Step Solution

1. Step 1: Write the proportion equation
   19,909,507,329 : 42,658,833,990 = 42,658,833,990 : x
2. Step 2: Convert to fraction form
   19,909,507,329/42,658,833,990 = 42,658,833,990/x
3. Step 3: Cross multiply
   19,909,507,329x = 42,658,833,990 × 42,658,833,990
4. Step 4: Simplify right side
   19,909,507,329x = 1,819,776,117,386,379,264,000
5. Step 5: Solve for x
   x = 1,819,776,117,386,379,264,000/19,909,507,329
6. Step 6: Final answer
   x = 91,402,368,090.53