Finding the Fourth Proportional to 1,030.02, 1,421.89 and 657.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.02 : 1,421.89 = 657.50 : x
2. Step 2: Convert to fraction form
   1,030.02/1,421.89 = 657.50/x
3. Step 3: Cross multiply
   1,030.02x = 1,421.89 × 657.50
4. Step 4: Simplify right side
   1,030.02x = 934,892.68
5. Step 5: Solve for x
   x = 934,892.68/1,030.02
6. Step 6: Final answer
   x = 907.65