Finding the Fourth Proportional to 56,557, 78,051.90 and 31,408.12

Step by Step Solution

1. Step 1: Write the proportion equation
   56,557 : 78,051.90 = 31,408.12 : x
2. Step 2: Convert to fraction form
   56,557/78,051.90 = 31,408.12/x
3. Step 3: Cross multiply
   56,557x = 78,051.90 × 31,408.12
4. Step 4: Simplify right side
   56,557x = 2,451,463,441.43
5. Step 5: Solve for x
   x = 2,451,463,441.43/56,557
6. Step 6: Final answer
   x = 43,345.00