Finding the Fourth Proportional to 99,804,932.10, 149,483,449.35 and 81,889,028.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,804,932.10 : 149,483,449.35 = 81,889,028.10 : x
2. Step 2: Convert to fraction form
   99,804,932.10/149,483,449.35 = 81,889,028.10/x
3. Step 3: Cross multiply
   99,804,932.10x = 149,483,449.35 × 81,889,028.10
4. Step 4: Simplify right side
   99,804,932.10x = 12,241,054,384,307,076
5. Step 5: Solve for x
   x = 12,241,054,384,307,076/99,804,932.10
6. Step 6: Final answer
   x = 122,649,794.22