Finding the Fourth Proportional to 510,639, 766,308.42 and 178,215

Step by Step Solution

1. Step 1: Write the proportion equation
   510,639 : 766,308.42 = 178,215 : x
2. Step 2: Convert to fraction form
   510,639/766,308.42 = 178,215/x
3. Step 3: Cross multiply
   510,639x = 766,308.42 × 178,215
4. Step 4: Simplify right side
   510,639x = 136,567,655,070.30
5. Step 5: Solve for x
   x = 136,567,655,070.30/510,639
6. Step 6: Final answer
   x = 267,444.62