Finding the Fourth Proportional to 12,300,507.30, 18,469,722.70 and 10,406,307.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300,507.30 : 18,469,722.70 = 10,406,307.72 : x
2. Step 2: Convert to fraction form
   12,300,507.30/18,469,722.70 = 10,406,307.72/x
3. Step 3: Cross multiply
   12,300,507.30x = 18,469,722.70 × 10,406,307.72
4. Step 4: Simplify right side
   12,300,507.30x = 192,201,617,919,269.25
5. Step 5: Solve for x
   x = 192,201,617,919,269.25/12,300,507.30
6. Step 6: Final answer
   x = 15,625,503.34