Finding the Fourth Proportional to 78,646.34, 108,528.21 and 42,836.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,646.34 : 108,528.21 = 42,836.18 : x
2. Step 2: Convert to fraction form
   78,646.34/108,528.21 = 42,836.18/x
3. Step 3: Cross multiply
   78,646.34x = 108,528.21 × 42,836.18
4. Step 4: Simplify right side
   78,646.34x = 4,648,933,938.64
5. Step 5: Solve for x
   x = 4,648,933,938.64/78,646.34
6. Step 6: Final answer
   x = 59,111.89