Finding the Fourth Proportional to 58,728,128.64, 81,012,162.60 and 54,571,443.56

Step by Step Solution

1. Step 1: Write the proportion equation
   58,728,128.64 : 81,012,162.60 = 54,571,443.56 : x
2. Step 2: Convert to fraction form
   58,728,128.64/81,012,162.60 = 54,571,443.56/x
3. Step 3: Cross multiply
   58,728,128.64x = 81,012,162.60 × 54,571,443.56
4. Step 4: Simplify right side
   58,728,128.64x = 4,420,950,658,999,442.50
5. Step 5: Solve for x
   x = 4,420,950,658,999,442.50/58,728,128.64
6. Step 6: Final answer
   x = 75,278,248.45