Finding the Fourth Proportional to 99,407.11, 137,185.59 and 56,973.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99,407.11 : 137,185.59 = 56,973.83 : x
2. Step 2: Convert to fraction form
   99,407.11/137,185.59 = 56,973.83/x
3. Step 3: Cross multiply
   99,407.11x = 137,185.59 × 56,973.83
4. Step 4: Simplify right side
   99,407.11x = 7,815,988,483.11
5. Step 5: Solve for x
   x = 7,815,988,483.11/99,407.11
6. Step 6: Final answer
   x = 78,626.05