Finding the Fourth Proportional to 634,978.32, 876,269.34 and 348,499.12

Step by Step Solution

1. Step 1: Write the proportion equation
   634,978.32 : 876,269.34 = 348,499.12 : x
2. Step 2: Convert to fraction form
   634,978.32/876,269.34 = 348,499.12/x
3. Step 3: Cross multiply
   634,978.32x = 876,269.34 × 348,499.12
4. Step 4: Simplify right side
   634,978.32x = 305,379,093,872.98
5. Step 5: Solve for x
   x = 305,379,093,872.98/634,978.32
6. Step 6: Final answer
   x = 480,928.38