Finding the Fourth Proportional to 625,980.42, 938,654.89 and 445,962.98

Step by Step Solution

1. Step 1: Write the proportion equation
   625,980.42 : 938,654.89 = 445,962.98 : x
2. Step 2: Convert to fraction form
   625,980.42/938,654.89 = 445,962.98/x
3. Step 3: Cross multiply
   625,980.42x = 938,654.89 × 445,962.98
4. Step 4: Simplify right side
   625,980.42x = 418,605,333,167.70
5. Step 5: Solve for x
   x = 418,605,333,167.70/625,980.42
6. Step 6: Final answer
   x = 668,719.53