Finding the Fourth Proportional to 13,867,123.98, 20,783,649.72 and 7,789,079.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,867,123.98 : 20,783,649.72 = 7,789,079.18 : x
2. Step 2: Convert to fraction form
   13,867,123.98/20,783,649.72 = 7,789,079.18/x
3. Step 3: Cross multiply
   13,867,123.98x = 20,783,649.72 × 7,789,079.18
4. Step 4: Simplify right side
   13,867,123.98x = 161,885,493,318,464.81
5. Step 5: Solve for x
   x = 161,885,493,318,464.81/13,867,123.98
6. Step 6: Final answer
   x = 11,674,049.61