Finding the Fourth Proportional to 138,461, 191,076.98 and 81,134.16

Step by Step Solution

1. Step 1: Write the proportion equation
   138,461 : 191,076.98 = 81,134.16 : x
2. Step 2: Convert to fraction form
   138,461/191,076.98 = 81,134.16/x
3. Step 3: Cross multiply
   138,461x = 191,076.98 × 81,134.16
4. Step 4: Simplify right side
   138,461x = 15,502,870,267.64
5. Step 5: Solve for x
   x = 15,502,870,267.64/138,461
6. Step 6: Final answer
   x = 111,965.61