Finding the Fourth Proportional to 303,384.12, 455,087.64 and 78,738.72

Step by Step Solution

1. Step 1: Write the proportion equation
   303,384.12 : 455,087.64 = 78,738.72 : x
2. Step 2: Convert to fraction form
   303,384.12/455,087.64 = 78,738.72/x
3. Step 3: Cross multiply
   303,384.12x = 455,087.64 × 78,738.72
4. Step 4: Simplify right side
   303,384.12x = 35,833,018,261.42
5. Step 5: Solve for x
   x = 35,833,018,261.42/303,384.12
6. Step 6: Final answer
   x = 118,111.05