Finding the Fourth Proportional to 1,007,109.32, 1,510,111.82 and 399,281.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007,109.32 : 1,510,111.82 = 399,281.88 : x
2. Step 2: Convert to fraction form
   1,007,109.32/1,510,111.82 = 399,281.88/x
3. Step 3: Cross multiply
   1,007,109.32x = 1,510,111.82 × 399,281.88
4. Step 4: Simplify right side
   1,007,109.32x = 602,960,286,499.82
5. Step 5: Solve for x
   x = 602,960,286,499.82/1,007,109.32
6. Step 6: Final answer
   x = 598,703.91