Finding the Fourth Proportional to 578,815.71, 798,326.55 and 507,071.22

Step by Step Solution

1. Step 1: Write the proportion equation
   578,815.71 : 798,326.55 = 507,071.22 : x
2. Step 2: Convert to fraction form
   578,815.71/798,326.55 = 507,071.22/x
3. Step 3: Cross multiply
   578,815.71x = 798,326.55 × 507,071.22
4. Step 4: Simplify right side
   578,815.71x = 404,808,417,666.89
5. Step 5: Solve for x
   x = 404,808,417,666.89/578,815.71
6. Step 6: Final answer
   x = 699,373.58