Finding the Fourth Proportional to 139,589.34, 209,404.71 and 64,717.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139,589.34 : 209,404.71 = 64,717.02 : x
2. Step 2: Convert to fraction form
   139,589.34/209,404.71 = 64,717.02/x
3. Step 3: Cross multiply
   139,589.34x = 209,404.71 × 64,717.02
4. Step 4: Simplify right side
   139,589.34x = 13,552,048,805.16
5. Step 5: Solve for x
   x = 13,552,048,805.16/139,589.34
6. Step 6: Final answer
   x = 97,085.13