Finding the Fourth Proportional to 1,011,670.72, 1,396,133.76 and 558,990.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011,670.72 : 1,396,133.76 = 558,990.88 : x
2. Step 2: Convert to fraction form
   1,011,670.72/1,396,133.76 = 558,990.88/x
3. Step 3: Cross multiply
   1,011,670.72x = 1,396,133.76 × 558,990.88
4. Step 4: Simplify right side
   1,011,670.72x = 780,426,039,100.11
5. Step 5: Solve for x
   x = 780,426,039,100.11/1,011,670.72
6. Step 6: Final answer
   x = 771,422.98