Finding the Fourth Proportional to 56,808.83, 78,396.18 and 31,315.62

Step by Step Solution

1. Step 1: Write the proportion equation
   56,808.83 : 78,396.18 = 31,315.62 : x
2. Step 2: Convert to fraction form
   56,808.83/78,396.18 = 31,315.62/x
3. Step 3: Cross multiply
   56,808.83x = 78,396.18 × 31,315.62
4. Step 4: Simplify right side
   56,808.83x = 2,455,024,762.02
5. Step 5: Solve for x
   x = 2,455,024,762.02/56,808.83
6. Step 6: Final answer
   x = 43,215.55