Finding the Fourth Proportional to 56,814.47, 78,409.51 and 42,449.37

Step by Step Solution

1. Step 1: Write the proportion equation
   56,814.47 : 78,409.51 = 42,449.37 : x
2. Step 2: Convert to fraction form
   56,814.47/78,409.51 = 42,449.37/x
3. Step 3: Cross multiply
   56,814.47x = 78,409.51 × 42,449.37
4. Step 4: Simplify right side
   56,814.47x = 3,328,434,301.51
5. Step 5: Solve for x
   x = 3,328,434,301.51/56,814.47
6. Step 6: Final answer
   x = 58,584.27