Finding the Fourth Proportional to 13,108,518.69, 18,091,886.63 and 7,886,804.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,108,518.69 : 18,091,886.63 = 7,886,804.69 : x
2. Step 2: Convert to fraction form
   13,108,518.69/18,091,886.63 = 7,886,804.69/x
3. Step 3: Cross multiply
   13,108,518.69x = 18,091,886.63 × 7,886,804.69
4. Step 4: Simplify right side
   13,108,518.69x = 142,687,176,194,538.84
5. Step 5: Solve for x
   x = 142,687,176,194,538.84/13,108,518.69
6. Step 6: Final answer
   x = 10,885,072.49