Finding the Fourth Proportional to 99,443.91, 149,165.88 and 81,876.84

Step by Step Solution

1. Step 1: Write the proportion equation
   99,443.91 : 149,165.88 = 81,876.84 : x
2. Step 2: Convert to fraction form
   99,443.91/149,165.88 = 81,876.84/x
3. Step 3: Cross multiply
   99,443.91x = 149,165.88 × 81,876.84
4. Step 4: Simplify right side
   99,443.91x = 12,213,230,890.22
5. Step 5: Solve for x
   x = 12,213,230,890.22/99,443.91
6. Step 6: Final answer
   x = 122,815.27