Finding the Fourth Proportional to 713,886.79, 1,070,297.55 and 429,510.72

Step by Step Solution

1. Step 1: Write the proportion equation
   713,886.79 : 1,070,297.55 = 429,510.72 : x
2. Step 2: Convert to fraction form
   713,886.79/1,070,297.55 = 429,510.72/x
3. Step 3: Cross multiply
   713,886.79x = 1,070,297.55 × 429,510.72
4. Step 4: Simplify right side
   713,886.79x = 459,704,271,314.74
5. Step 5: Solve for x
   x = 459,704,271,314.74/713,886.79
6. Step 6: Final answer
   x = 643,945.62