Finding the Fourth Proportional to 502,499.95, 693,449.94 and 276,145.45

Step by Step Solution

1. Step 1: Write the proportion equation
   502,499.95 : 693,449.94 = 276,145.45 : x
2. Step 2: Convert to fraction form
   502,499.95/693,449.94 = 276,145.45/x
3. Step 3: Cross multiply
   502,499.95x = 693,449.94 × 276,145.45
4. Step 4: Simplify right side
   502,499.95x = 191,493,046,606.37
5. Step 5: Solve for x
   x = 191,493,046,606.37/502,499.95
6. Step 6: Final answer
   x = 381,080.73