Finding the Fourth Proportional to 520,071.40, 729,083 and 520,071.40

Step by Step Solution

1. Step 1: Write the proportion equation
   520,071.40 : 729,083 = 520,071.40 : x
2. Step 2: Convert to fraction form
   520,071.40/729,083 = 520,071.40/x
3. Step 3: Cross multiply
   520,071.40x = 729,083 × 520,071.40
4. Step 4: Simplify right side
   520,071.40x = 379,175,216,526.20
5. Step 5: Solve for x
   x = 379,175,216,526.20/520,071.40
6. Step 6: Final answer
   x = 729,083