Finding the Fourth Proportional to 101,204.64, 139,637.52 and 78,503.58

Step by Step Solution

1. Step 1: Write the proportion equation
   101,204.64 : 139,637.52 = 78,503.58 : x
2. Step 2: Convert to fraction form
   101,204.64/139,637.52 = 78,503.58/x
3. Step 3: Cross multiply
   101,204.64x = 139,637.52 × 78,503.58
4. Step 4: Simplify right side
   101,204.64x = 10,962,045,222.32
5. Step 5: Solve for x
   x = 10,962,045,222.32/101,204.64
6. Step 6: Final answer
   x = 108,315.64