Finding the Fourth Proportional to 99,401.16, 137,176.74 and 56,973

Step by Step Solution

1. Step 1: Write the proportion equation
   99,401.16 : 137,176.74 = 56,973 : x
2. Step 2: Convert to fraction form
   99,401.16/137,176.74 = 56,973/x
3. Step 3: Cross multiply
   99,401.16x = 137,176.74 × 56,973
4. Step 4: Simplify right side
   99,401.16x = 7,815,370,408.02
5. Step 5: Solve for x
   x = 7,815,370,408.02/99,401.16
6. Step 6: Final answer
   x = 78,624.54