Finding the Fourth Proportional to 139,870.32, 209,857.32 and 65,030.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,870.32 : 209,857.32 = 65,030.64 : x
2. Step 2: Convert to fraction form
   139,870.32/209,857.32 = 65,030.64/x
3. Step 3: Cross multiply
   139,870.32x = 209,857.32 × 65,030.64
4. Step 4: Simplify right side
   139,870.32x = 13,647,155,828.28
5. Step 5: Solve for x
   x = 13,647,155,828.28/139,870.32
6. Step 6: Final answer
   x = 97,570.06