Finding the Fourth Proportional to 1,258,525.50, 1,737,421.83 and 978,501.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258,525.50 : 1,737,421.83 = 978,501.78 : x
2. Step 2: Convert to fraction form
   1,258,525.50/1,737,421.83 = 978,501.78/x
3. Step 3: Cross multiply
   1,258,525.50x = 1,737,421.83 × 978,501.78
4. Step 4: Simplify right side
   1,258,525.50x = 1,700,070,353,265.86
5. Step 5: Solve for x
   x = 1,700,070,353,265.86/1,258,525.50
6. Step 6: Final answer
   x = 1,350,842.99