Finding the Fourth Proportional to 13,256,012.72, 18,293,010.73 and 7,674,494.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,256,012.72 : 18,293,010.73 = 7,674,494.57 : x
2. Step 2: Convert to fraction form
   13,256,012.72/18,293,010.73 = 7,674,494.57/x
3. Step 3: Cross multiply
   13,256,012.72x = 18,293,010.73 × 7,674,494.57
4. Step 4: Simplify right side
   13,256,012.72x = 140,389,611,477,964.28
5. Step 5: Solve for x
   x = 140,389,611,477,964.28/13,256,012.72
6. Step 6: Final answer
   x = 10,590,636.45