Finding the Third Proportional to 19,909,507,312 and 42,658,833,958

Step by Step Solution

1. Step 1: Write the proportion equation
   19,909,507,312 : 42,658,833,958 = 42,658,833,958 : x
2. Step 2: Convert to fraction form
   19,909,507,312/42,658,833,958 = 42,658,833,958/x
3. Step 3: Cross multiply
   19,909,507,312x = 42,658,833,958 × 42,658,833,958
4. Step 4: Simplify right side
   19,909,507,312x = 1,819,776,114,656,213,991,424
5. Step 5: Solve for x
   x = 1,819,776,114,656,213,991,424/19,909,507,312
6. Step 6: Final answer
   x = 91,402,368,031.45