Finding the Fourth Proportional to 78,012.18, 107,656.61 and 42,202.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,012.18 : 107,656.61 = 42,202.17 : x
2. Step 2: Convert to fraction form
   78,012.18/107,656.61 = 42,202.17/x
3. Step 3: Cross multiply
   78,012.18x = 107,656.61 × 42,202.17
4. Step 4: Simplify right side
   78,012.18x = 4,543,342,345.83
5. Step 5: Solve for x
   x = 4,543,342,345.83/78,012.18
6. Step 6: Final answer
   x = 58,238.88