Finding the Fourth Proportional to 13,061,119.98, 18,023,885.64 and 7,180,711.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061,119.98 : 18,023,885.64 = 7,180,711.50 : x
2. Step 2: Convert to fraction form
   13,061,119.98/18,023,885.64 = 7,180,711.50/x
3. Step 3: Cross multiply
   13,061,119.98x = 18,023,885.64 × 7,180,711.50
4. Step 4: Simplify right side
   13,061,119.98x = 129,424,322,889,832.86
5. Step 5: Solve for x
   x = 129,424,322,889,832.86/13,061,119.98
6. Step 6: Final answer
   x = 9,909,129.01