Finding the Fourth Proportional to 51,230,494.72, 76,840,062.72 and 12,892,019.20

Step by Step Solution

1. Step 1: Write the proportion equation
   51,230,494.72 : 76,840,062.72 = 12,892,019.20 : x
2. Step 2: Convert to fraction form
   51,230,494.72/76,840,062.72 = 12,892,019.20/x
3. Step 3: Cross multiply
   51,230,494.72x = 76,840,062.72 × 12,892,019.20
4. Step 4: Simplify right side
   51,230,494.72x = 990,623,563,915,444.12
5. Step 5: Solve for x
   x = 990,623,563,915,444.12/51,230,494.72
6. Step 6: Final answer
   x = 19,336,599.60