Finding the Fourth Proportional to 1,059,897.30, 1,587,513.15 and 638,438.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059,897.30 : 1,587,513.15 = 638,438.10 : x
2. Step 2: Convert to fraction form
   1,059,897.30/1,587,513.15 = 638,438.10/x
3. Step 3: Cross multiply
   1,059,897.30x = 1,587,513.15 × 638,438.10
4. Step 4: Simplify right side
   1,059,897.30x = 1,013,528,879,211.01
5. Step 5: Solve for x
   x = 1,013,528,879,211.01/1,059,897.30
6. Step 6: Final answer
   x = 956,251.97