Finding the Fourth Proportional to 78,012.07, 107,656.56 and 42,202

Step by Step Solution

1. Step 1: Write the proportion equation
   78,012.07 : 107,656.56 = 42,202 : x
2. Step 2: Convert to fraction form
   78,012.07/107,656.56 = 42,202/x
3. Step 3: Cross multiply
   78,012.07x = 107,656.56 × 42,202
4. Step 4: Simplify right side
   78,012.07x = 4,543,322,145.12
5. Step 5: Solve for x
   x = 4,543,322,145.12/78,012.07
6. Step 6: Final answer
   x = 58,238.71