Finding the Fourth Proportional to 942,168.58, 1,300,128.64 and 512,439.48

Step by Step Solution

1. Step 1: Write the proportion equation
   942,168.58 : 1,300,128.64 = 512,439.48 : x
2. Step 2: Convert to fraction form
   942,168.58/1,300,128.64 = 512,439.48/x
3. Step 3: Cross multiply
   942,168.58x = 1,300,128.64 × 512,439.48
4. Step 4: Simplify right side
   942,168.58x = 666,237,242,933.61
5. Step 5: Solve for x
   x = 666,237,242,933.61/942,168.58
6. Step 6: Final answer
   x = 707,131.67