Finding the Fourth Proportional to 272,382.35, 408,572.15 and 69,978.23

Step by Step Solution

1. Step 1: Write the proportion equation
   272,382.35 : 408,572.15 = 69,978.23 : x
2. Step 2: Convert to fraction form
   272,382.35/408,572.15 = 69,978.23/x
3. Step 3: Cross multiply
   272,382.35x = 408,572.15 × 69,978.23
4. Step 4: Simplify right side
   272,382.35x = 28,591,155,417.32
5. Step 5: Solve for x
   x = 28,591,155,417.32/272,382.35
6. Step 6: Final answer
   x = 104,966.99