Finding the Fourth Proportional to 85,109.02, 117,443.19 and 47,386.78

Step by Step Solution

1. Step 1: Write the proportion equation
   85,109.02 : 117,443.19 = 47,386.78 : x
2. Step 2: Convert to fraction form
   85,109.02/117,443.19 = 47,386.78/x
3. Step 3: Cross multiply
   85,109.02x = 117,443.19 × 47,386.78
4. Step 4: Simplify right side
   85,109.02x = 5,565,254,607.03
5. Step 5: Solve for x
   x = 5,565,254,607.03/85,109.02
6. Step 6: Final answer
   x = 65,389.72