Finding the Fourth Proportional to 921,064.63, 1,271,019.97 and 507,587.98

Step by Step Solution

1. Step 1: Write the proportion equation
   921,064.63 : 1,271,019.97 = 507,587.98 : x
2. Step 2: Convert to fraction form
   921,064.63/1,271,019.97 = 507,587.98/x
3. Step 3: Cross multiply
   921,064.63x = 1,271,019.97 × 507,587.98
4. Step 4: Simplify right side
   921,064.63x = 645,154,459,111.96
5. Step 5: Solve for x
   x = 645,154,459,111.96/921,064.63
6. Step 6: Final answer
   x = 700,444.29