Finding the Fourth Proportional to 100,900,789.15, 139,243,083.69 and 54,491,038.60

Step by Step Solution

1. Step 1: Write the proportion equation
   100,900,789.15 : 139,243,083.69 = 54,491,038.60 : x
2. Step 2: Convert to fraction form
   100,900,789.15/139,243,083.69 = 54,491,038.60/x
3. Step 3: Cross multiply
   100,900,789.15x = 139,243,083.69 × 54,491,038.60
4. Step 4: Simplify right side
   100,900,789.15x = 7,587,500,247,991,053
5. Step 5: Solve for x
   x = 7,587,500,247,991,053/100,900,789.15
6. Step 6: Final answer
   x = 75,197,630.39