Finding the Fourth Proportional to 12,406,986.10, 18,610,485.90 and 3,887,989.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406,986.10 : 18,610,485.90 = 3,887,989.30 : x
2. Step 2: Convert to fraction form
   12,406,986.10/18,610,485.90 = 3,887,989.30/x
3. Step 3: Cross multiply
   12,406,986.10x = 18,610,485.90 × 3,887,989.30
4. Step 4: Simplify right side
   12,406,986.10x = 72,357,370,047,000.86
5. Step 5: Solve for x
   x = 72,357,370,047,000.86/12,406,986.10
6. Step 6: Final answer
   x = 5,831,986.07