Finding the Fourth Proportional to 72,728,764.80, 109,146,291.30 and 51,205,404.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72,728,764.80 : 109,146,291.30 = 51,205,404.30 : x
2. Step 2: Convert to fraction form
   72,728,764.80/109,146,291.30 = 51,205,404.30/x
3. Step 3: Cross multiply
   72,728,764.80x = 109,146,291.30 × 51,205,404.30
4. Step 4: Simplify right side
   72,728,764.80x = 5,588,879,973,862,072
5. Step 5: Solve for x
   x = 5,588,879,973,862,072/72,728,764.80
6. Step 6: Final answer
   x = 76,845,523.08