Finding the Fourth Proportional to 963,148, 1,438,864.72 and 623,420.96

Step by Step Solution

1. Step 1: Write the proportion equation
   963,148 : 1,438,864.72 = 623,420.96 : x
2. Step 2: Convert to fraction form
   963,148/1,438,864.72 = 623,420.96/x
3. Step 3: Cross multiply
   963,148x = 1,438,864.72 × 623,420.96
4. Step 4: Simplify right side
   963,148x = 897,018,425,052.53
5. Step 5: Solve for x
   x = 897,018,425,052.53/963,148
6. Step 6: Final answer
   x = 931,340.17