Finding the Fourth Proportional to 13,519,123.86, 18,658,128.69 and 7,716,577.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,519,123.86 : 18,658,128.69 = 7,716,577.62 : x
2. Step 2: Convert to fraction form
   13,519,123.86/18,658,128.69 = 7,716,577.62/x
3. Step 3: Cross multiply
   13,519,123.86x = 18,658,128.69 × 7,716,577.62
4. Step 4: Simplify right side
   13,519,123.86x = 143,976,898,280,333.94
5. Step 5: Solve for x
   x = 143,976,898,280,333.94/13,519,123.86
6. Step 6: Final answer
   x = 10,649,869.01