Finding the Fourth Proportional to 663,510,815.50, 915,645,319.32 and 370,155,383.50

Step by Step Solution

1. Step 1: Write the proportion equation
   663,510,815.50 : 915,645,319.32 = 370,155,383.50 : x
2. Step 2: Convert to fraction form
   663,510,815.50/915,645,319.32 = 370,155,383.50/x
3. Step 3: Cross multiply
   663,510,815.50x = 915,645,319.32 × 370,155,383.50
4. Step 4: Simplify right side
   663,510,815.50x = 338,931,044,322,874,560
5. Step 5: Solve for x
   x = 338,931,044,322,874,560/663,510,815.50
6. Step 6: Final answer
   x = 510,814,648.99