Finding the Third Proportional to 179,462,478 and 390,417,756

Step by Step Solution

1. Step 1: Write the proportion equation
   179,462,478 : 390,417,756 = 390,417,756 : x
2. Step 2: Convert to fraction form
   179,462,478/390,417,756 = 390,417,756/x
3. Step 3: Cross multiply
   179,462,478x = 390,417,756 × 390,417,756
4. Step 4: Simplify right side
   179,462,478x = 152,426,024,200,075,520
5. Step 5: Solve for x
   x = 152,426,024,200,075,520/179,462,478
6. Step 6: Final answer
   x = 849,347,595.66