Finding the Fourth Proportional to 521,465.10, 731,100.90 and 521,465.10

Step by Step Solution

1. Step 1: Write the proportion equation
   521,465.10 : 731,100.90 = 521,465.10 : x
2. Step 2: Convert to fraction form
   521,465.10/731,100.90 = 521,465.10/x
3. Step 3: Cross multiply
   521,465.10x = 731,100.90 × 521,465.10
4. Step 4: Simplify right side
   521,465.10x = 381,243,603,928.59
5. Step 5: Solve for x
   x = 381,243,603,928.59/521,465.10
6. Step 6: Final answer
   x = 731,100.90