Finding the Third Proportional to 9,570,188 and 21,000,405

Step by Step Solution

1. Step 1: Write the proportion equation
   9,570,188 : 21,000,405 = 21,000,405 : x
2. Step 2: Convert to fraction form
   9,570,188/21,000,405 = 21,000,405/x
3. Step 3: Cross multiply
   9,570,188x = 21,000,405 × 21,000,405
4. Step 4: Simplify right side
   9,570,188x = 441,017,010,164,025
5. Step 5: Solve for x
   x = 441,017,010,164,025/9,570,188
6. Step 6: Final answer
   x = 46,082,376.87