Finding the Fourth Proportional to 105,180,581.61, 145,149,932.21 and 58,772,791.53

Step by Step Solution

1. Step 1: Write the proportion equation
   105,180,581.61 : 145,149,932.21 = 58,772,791.53 : x
2. Step 2: Convert to fraction form
   105,180,581.61/145,149,932.21 = 58,772,791.53/x
3. Step 3: Cross multiply
   105,180,581.61x = 145,149,932.21 × 58,772,791.53
4. Step 4: Simplify right side
   105,180,581.61x = 8,530,866,706,078,099
5. Step 5: Solve for x
   x = 8,530,866,706,078,099/105,180,581.61
6. Step 6: Final answer
   x = 81,106,859.99