Finding the Fourth Proportional to 56,679.47, 78,223.19 and 42,314.37

Step by Step Solution

1. Step 1: Write the proportion equation
   56,679.47 : 78,223.19 = 42,314.37 : x
2. Step 2: Convert to fraction form
   56,679.47/78,223.19 = 42,314.37/x
3. Step 3: Cross multiply
   56,679.47x = 78,223.19 × 42,314.37
4. Step 4: Simplify right side
   56,679.47x = 3,309,964,792.67
5. Step 5: Solve for x
   x = 3,309,964,792.67/56,679.47
6. Step 6: Final answer
   x = 58,397.95