Finding the Third Proportional to 42,571,172 and 64,919,480

Step by Step Solution

1. Step 1: Write the proportion equation
   42,571,172 : 64,919,480 = 64,919,480 : x
2. Step 2: Convert to fraction form
   42,571,172/64,919,480 = 64,919,480/x
3. Step 3: Cross multiply
   42,571,172x = 64,919,480 × 64,919,480
4. Step 4: Simplify right side
   42,571,172x = 4,214,538,883,470,400
5. Step 5: Solve for x
   x = 4,214,538,883,470,400/42,571,172
6. Step 6: Final answer
   x = 98,999,832.17