Finding the Fourth Proportional to 78,776.49, 108,712.86 and 42,966.51

Step by Step Solution

1. Step 1: Write the proportion equation
   78,776.49 : 108,712.86 = 42,966.51 : x
2. Step 2: Convert to fraction form
   78,776.49/108,712.86 = 42,966.51/x
3. Step 3: Cross multiply
   78,776.49x = 108,712.86 × 42,966.51
4. Step 4: Simplify right side
   78,776.49x = 4,671,011,608.83
5. Step 5: Solve for x
   x = 4,671,011,608.83/78,776.49
6. Step 6: Final answer
   x = 59,294.48