Finding the Fourth Proportional to 13,262,978.28, 19,894,466.25 and 3,678,356.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,262,978.28 : 19,894,466.25 = 3,678,356.70 : x
2. Step 2: Convert to fraction form
   13,262,978.28/19,894,466.25 = 3,678,356.70/x
3. Step 3: Cross multiply
   13,262,978.28x = 19,894,466.25 × 3,678,356.70
4. Step 4: Simplify right side
   13,262,978.28x = 73,178,943,223,611.38
5. Step 5: Solve for x
   x = 73,178,943,223,611.38/13,262,978.28
6. Step 6: Final answer
   x = 5,517,534.73