Finding the Fourth Proportional to 1,488,457.32, 2,229,875.69 and 879,428.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488,457.32 : 2,229,875.69 = 879,428.40 : x
2. Step 2: Convert to fraction form
   1,488,457.32/2,229,875.69 = 879,428.40/x
3. Step 3: Cross multiply
   1,488,457.32x = 2,229,875.69 × 879,428.40
4. Step 4: Simplify right side
   1,488,457.32x = 1,961,016,009,156.31
5. Step 5: Solve for x
   x = 1,961,016,009,156.31/1,488,457.32
6. Step 6: Final answer
   x = 1,317,482.19