Finding the Fourth Proportional to 139,417.75, 209,009.04 and 60,472.51

Step by Step Solution

1. Step 1: Write the proportion equation
   139,417.75 : 209,009.04 = 60,472.51 : x
2. Step 2: Convert to fraction form
   139,417.75/209,009.04 = 60,472.51/x
3. Step 3: Cross multiply
   139,417.75x = 209,009.04 × 60,472.51
4. Step 4: Simplify right side
   139,417.75x = 12,639,301,261.49
5. Step 5: Solve for x
   x = 12,639,301,261.49/139,417.75
6. Step 6: Final answer
   x = 90,657.76