Finding the Fourth Proportional to 13,320,290.89, 18,381,965.25 and 7,208,719.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320,290.89 : 18,381,965.25 = 7,208,719.39 : x
2. Step 2: Convert to fraction form
   13,320,290.89/18,381,965.25 = 7,208,719.39/x
3. Step 3: Cross multiply
   13,320,290.89x = 18,381,965.25 × 7,208,719.39
4. Step 4: Simplify right side
   13,320,290.89x = 132,510,429,323,981.19
5. Step 5: Solve for x
   x = 132,510,429,323,981.19/13,320,290.89
6. Step 6: Final answer
   x = 9,948,013.18