Finding the Fourth Proportional to 99,779.32, 137,695.18 and 55,067

Step by Step Solution

1. Step 1: Write the proportion equation
   99,779.32 : 137,695.18 = 55,067 : x
2. Step 2: Convert to fraction form
   99,779.32/137,695.18 = 55,067/x
3. Step 3: Cross multiply
   99,779.32x = 137,695.18 × 55,067
4. Step 4: Simplify right side
   99,779.32x = 7,582,460,477.06
5. Step 5: Solve for x
   x = 7,582,460,477.06/99,779.32
6. Step 6: Final answer
   x = 75,992.30