Finding the Fourth Proportional to 105,317,311.57, 145,325,155.80 and 60,677,887.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,317,311.57 : 145,325,155.80 = 60,677,887.31 : x
2. Step 2: Convert to fraction form
   105,317,311.57/145,325,155.80 = 60,677,887.31/x
3. Step 3: Cross multiply
   105,317,311.57x = 145,325,155.80 × 60,677,887.31
4. Step 4: Simplify right side
   105,317,311.57x = 8,818,023,427,303,907
5. Step 5: Solve for x
   x = 8,818,023,427,303,907/105,317,311.57
6. Step 6: Final answer
   x = 83,728,147.79