Finding the Third Proportional to 19,781,748 and 42,176,393

Step by Step Solution

1. Step 1: Write the proportion equation
   19,781,748 : 42,176,393 = 42,176,393 : x
2. Step 2: Convert to fraction form
   19,781,748/42,176,393 = 42,176,393/x
3. Step 3: Cross multiply
   19,781,748x = 42,176,393 × 42,176,393
4. Step 4: Simplify right side
   19,781,748x = 1,778,848,126,490,449
5. Step 5: Solve for x
   x = 1,778,848,126,490,449/19,781,748
6. Step 6: Final answer
   x = 89,923,707.78