Finding the Fourth Proportional to 912,892.01, 1,369,462.61 and 380,288.45

Step by Step Solution

1. Step 1: Write the proportion equation
   912,892.01 : 1,369,462.61 = 380,288.45 : x
2. Step 2: Convert to fraction form
   912,892.01/1,369,462.61 = 380,288.45/x
3. Step 3: Cross multiply
   912,892.01x = 1,369,462.61 × 380,288.45
4. Step 4: Simplify right side
   912,892.01x = 520,790,817,664.23
5. Step 5: Solve for x
   x = 520,790,817,664.23/912,892.01
6. Step 6: Final answer
   x = 570,484.59