Finding the Fourth Proportional to 2,870,152, 4,305,757 and 1,187,386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870,152 : 4,305,757 = 1,187,386.72 : x
2. Step 2: Convert to fraction form
   2,870,152/4,305,757 = 1,187,386.72/x
3. Step 3: Cross multiply
   2,870,152x = 4,305,757 × 1,187,386.72
4. Step 4: Simplify right side
   2,870,152x = 5,112,598,681,347.04
5. Step 5: Solve for x
   x = 5,112,598,681,347.04/2,870,152
6. Step 6: Final answer
   x = 1,781,298.93