Finding the Third Proportional to 19,909,507,892 and 42,658,835,068

Step by Step Solution

1. Step 1: Write the proportion equation
   19,909,507,892 : 42,658,835,068 = 42,658,835,068 : x
2. Step 2: Convert to fraction form
   19,909,507,892/42,658,835,068 = 42,658,835,068/x
3. Step 3: Cross multiply
   19,909,507,892x = 42,658,835,068 × 42,658,835,068
4. Step 4: Simplify right side
   19,909,507,892x = 1,819,776,209,358,826,504,192
5. Step 5: Solve for x
   x = 1,819,776,209,358,826,504,192/19,909,507,892
6. Step 6: Final answer
   x = 91,402,370,125.38