Finding the Fourth Proportional to 139,507.36, 209,210.87 and 48,298.00

Step by Step Solution

1. Step 1: Write the proportion equation
   139,507.36 : 209,210.87 = 48,298.00 : x
2. Step 2: Convert to fraction form
   139,507.36/209,210.87 = 48,298.00/x
3. Step 3: Cross multiply
   139,507.36x = 209,210.87 × 48,298.00
4. Step 4: Simplify right side
   139,507.36x = 10,104,466,015.86
5. Step 5: Solve for x
   x = 10,104,466,015.86/139,507.36
6. Step 6: Final answer
   x = 72,429.63