Finding the Fourth Proportional to 120,141, 165,788.10 and 66,422.88

Step by Step Solution

1. Step 1: Write the proportion equation
   120,141 : 165,788.10 = 66,422.88 : x
2. Step 2: Convert to fraction form
   120,141/165,788.10 = 66,422.88/x
3. Step 3: Cross multiply
   120,141x = 165,788.10 × 66,422.88
4. Step 4: Simplify right side
   120,141x = 11,012,123,071.73
5. Step 5: Solve for x
   x = 11,012,123,071.73/120,141
6. Step 6: Final answer
   x = 91,659.99