Finding the Fourth Proportional to 56,816.32, 78,412.06 and 42,451.22

Step by Step Solution

1. Step 1: Write the proportion equation
   56,816.32 : 78,412.06 = 42,451.22 : x
2. Step 2: Convert to fraction form
   56,816.32/78,412.06 = 42,451.22/x
3. Step 3: Cross multiply
   56,816.32x = 78,412.06 × 42,451.22
4. Step 4: Simplify right side
   56,816.32x = 3,328,687,609.71
5. Step 5: Solve for x
   x = 3,328,687,609.71/56,816.32
6. Step 6: Final answer
   x = 58,586.82