Finding the Fourth Proportional to 300,010,870.71, 452,264,948.28 and 280,012,081.68

Step by Step Solution

1. Step 1: Write the proportion equation
   300,010,870.71 : 452,264,948.28 = 280,012,081.68 : x
2. Step 2: Convert to fraction form
   300,010,870.71/452,264,948.28 = 280,012,081.68/x
3. Step 3: Cross multiply
   300,010,870.71x = 452,264,948.28 × 280,012,081.68
4. Step 4: Simplify right side
   300,010,870.71x = 126,639,649,638,780,336
5. Step 5: Solve for x
   x = 126,639,649,638,780,336/300,010,870.71
6. Step 6: Final answer
   x = 422,116,869.76