Finding the Third Proportional to 64,931,429 and 142,848,990

Step by Step Solution

1. Step 1: Write the proportion equation
   64,931,429 : 142,848,990 = 142,848,990 : x
2. Step 2: Convert to fraction form
   64,931,429/142,848,990 = 142,848,990/x
3. Step 3: Cross multiply
   64,931,429x = 142,848,990 × 142,848,990
4. Step 4: Simplify right side
   64,931,429x = 20,405,833,944,020,100
5. Step 5: Solve for x
   x = 20,405,833,944,020,100/64,931,429
6. Step 6: Final answer
   x = 314,267,439.64