Finding the Fourth Proportional to 390,761.00, 586,071.78 and 210,762.69

Step by Step Solution

1. Step 1: Write the proportion equation
   390,761.00 : 586,071.78 = 210,762.69 : x
2. Step 2: Convert to fraction form
   390,761.00/586,071.78 = 210,762.69/x
3. Step 3: Cross multiply
   390,761.00x = 586,071.78 × 210,762.69
4. Step 4: Simplify right side
   390,761.00x = 123,522,064,885.89
5. Step 5: Solve for x
   x = 123,522,064,885.89/390,761.00
6. Step 6: Final answer
   x = 316,106.43