Finding the Fourth Proportional to 148,854, 205,418.52 and 81,786

Step by Step Solution

1. Step 1: Write the proportion equation
   148,854 : 205,418.52 = 81,786 : x
2. Step 2: Convert to fraction form
   148,854/205,418.52 = 81,786/x
3. Step 3: Cross multiply
   148,854x = 205,418.52 × 81,786
4. Step 4: Simplify right side
   148,854x = 16,800,359,076.72
5. Step 5: Solve for x
   x = 16,800,359,076.72/148,854
6. Step 6: Final answer
   x = 112,864.68