Finding the Fourth Proportional to 78,536.74, 117,735.33 and 28,607.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,536.74 : 117,735.33 = 28,607.53 : x
2. Step 2: Convert to fraction form
   78,536.74/117,735.33 = 28,607.53/x
3. Step 3: Cross multiply
   78,536.74x = 117,735.33 × 28,607.53
4. Step 4: Simplify right side
   78,536.74x = 3,368,116,985.03
5. Step 5: Solve for x
   x = 3,368,116,985.03/78,536.74
6. Step 6: Final answer
   x = 42,885.88