Finding the Fourth Proportional to 13,184,871.18, 19,782,990.18 and 7,118,398.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,184,871.18 : 19,782,990.18 = 7,118,398.32 : x
2. Step 2: Convert to fraction form
   13,184,871.18/19,782,990.18 = 7,118,398.32/x
3. Step 3: Cross multiply
   13,184,871.18x = 19,782,990.18 × 7,118,398.32
4. Step 4: Simplify right side
   13,184,871.18x = 140,823,204,061,888.50
5. Step 5: Solve for x
   x = 140,823,204,061,888.50/13,184,871.18
6. Step 6: Final answer
   x = 10,680,665.90