Finding the Third Proportional to 19,580,840 and 42,415,988

Step by Step Solution

1. Step 1: Write the proportion equation
   19,580,840 : 42,415,988 = 42,415,988 : x
2. Step 2: Convert to fraction form
   19,580,840/42,415,988 = 42,415,988/x
3. Step 3: Cross multiply
   19,580,840x = 42,415,988 × 42,415,988
4. Step 4: Simplify right side
   19,580,840x = 1,799,116,038,016,144
5. Step 5: Solve for x
   x = 1,799,116,038,016,144/19,580,840
6. Step 6: Final answer
   x = 91,881,453.40