Finding the Fourth Proportional to 1,112,698.17, 1,666,451.52 and 812,434.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112,698.17 : 1,666,451.52 = 812,434.01 : x
2. Step 2: Convert to fraction form
   1,112,698.17/1,666,451.52 = 812,434.01/x
3. Step 3: Cross multiply
   1,112,698.17x = 1,666,451.52 × 812,434.01
4. Step 4: Simplify right side
   1,112,698.17x = 1,353,881,882,531.94
5. Step 5: Solve for x
   x = 1,353,881,882,531.94/1,112,698.17
6. Step 6: Final answer
   x = 1,216,755.74