Finding the Fourth Proportional to 661,669.98, 913,312.71 and 375,380.34

Step by Step Solution

1. Step 1: Write the proportion equation
   661,669.98 : 913,312.71 = 375,380.34 : x
2. Step 2: Convert to fraction form
   661,669.98/913,312.71 = 375,380.34/x
3. Step 3: Cross multiply
   661,669.98x = 913,312.71 × 375,380.34
4. Step 4: Simplify right side
   661,669.98x = 342,839,635,606.12
5. Step 5: Solve for x
   x = 342,839,635,606.12/661,669.98
6. Step 6: Final answer
   x = 518,142.95