Finding the Fourth Proportional to 56,814.24, 78,545.36 and 42,642.48

Step by Step Solution

1. Step 1: Write the proportion equation
   56,814.24 : 78,545.36 = 42,642.48 : x
2. Step 2: Convert to fraction form
   56,814.24/78,545.36 = 42,642.48/x
3. Step 3: Cross multiply
   56,814.24x = 78,545.36 × 42,642.48
4. Step 4: Simplify right side
   56,814.24x = 3,349,368,942.89
5. Step 5: Solve for x
   x = 3,349,368,942.89/56,814.24
6. Step 6: Final answer
   x = 58,952.98