Finding the Fourth Proportional to 78,577.84, 108,439.72 and 42,770.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,577.84 : 108,439.72 = 42,770.17 : x
2. Step 2: Convert to fraction form
   78,577.84/108,439.72 = 42,770.17/x
3. Step 3: Cross multiply
   78,577.84x = 108,439.72 × 42,770.17
4. Step 4: Simplify right side
   78,577.84x = 4,637,985,152.23
5. Step 5: Solve for x
   x = 4,637,985,152.23/78,577.84
6. Step 6: Final answer
   x = 59,024.09