Finding the Fourth Proportional to 666,303.31, 919,498.71 and 375,976.51

Step by Step Solution

1. Step 1: Write the proportion equation
   666,303.31 : 919,498.71 = 375,976.51 : x
2. Step 2: Convert to fraction form
   666,303.31/919,498.71 = 375,976.51/x
3. Step 3: Cross multiply
   666,303.31x = 919,498.71 × 375,976.51
4. Step 4: Simplify right side
   666,303.31x = 345,709,915,935.30
5. Step 5: Solve for x
   x = 345,709,915,935.30/666,303.31
6. Step 6: Final answer
   x = 518,847.66