Finding the Fourth Proportional to 78,362.40, 108,139.80 and 42,552.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,362.40 : 108,139.80 = 42,552.12 : x
2. Step 2: Convert to fraction form
   78,362.40/108,139.80 = 42,552.12/x
3. Step 3: Cross multiply
   78,362.40x = 108,139.80 × 42,552.12
4. Step 4: Simplify right side
   78,362.40x = 4,601,577,746.38
5. Step 5: Solve for x
   x = 4,601,577,746.38/78,362.40
6. Step 6: Final answer
   x = 58,721.76