Finding the Fourth Proportional to 538,152.32, 742,646.72 and 296,429.28

Step by Step Solution

1. Step 1: Write the proportion equation
   538,152.32 : 742,646.72 = 296,429.28 : x
2. Step 2: Convert to fraction form
   538,152.32/742,646.72 = 296,429.28/x
3. Step 3: Cross multiply
   538,152.32x = 742,646.72 × 296,429.28
4. Step 4: Simplify right side
   538,152.32x = 220,142,231,021.82
5. Step 5: Solve for x
   x = 220,142,231,021.82/538,152.32
6. Step 6: Final answer
   x = 409,070.49