Finding the Fourth Proportional to 51,230,498.72, 76,840,068.72 and 12,892,023.20

Step by Step Solution

1. Step 1: Write the proportion equation
   51,230,498.72 : 76,840,068.72 = 12,892,023.20 : x
2. Step 2: Convert to fraction form
   51,230,498.72/76,840,068.72 = 12,892,023.20/x
3. Step 3: Cross multiply
   51,230,498.72x = 76,840,068.72 × 12,892,023.20
4. Step 4: Simplify right side
   51,230,498.72x = 990,623,948,627,834.25
5. Step 5: Solve for x
   x = 990,623,948,627,834.25/51,230,498.72
6. Step 6: Final answer
   x = 19,336,605.60