Finding the Fourth Proportional to 1,430,103.78, 2,145,127.86 and 577,152.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430,103.78 : 2,145,127.86 = 577,152.72 : x
2. Step 2: Convert to fraction form
   1,430,103.78/2,145,127.86 = 577,152.72/x
3. Step 3: Cross multiply
   1,430,103.78x = 2,145,127.86 × 577,152.72
4. Step 4: Simplify right side
   1,430,103.78x = 1,238,066,379,146.78
5. Step 5: Solve for x
   x = 1,238,066,379,146.78/1,430,103.78
6. Step 6: Final answer
   x = 865,717.86