Finding the Fourth Proportional to 478,300.59, 660,055.50 and 260,510.13

Step by Step Solution

1. Step 1: Write the proportion equation
   478,300.59 : 660,055.50 = 260,510.13 : x
2. Step 2: Convert to fraction form
   478,300.59/660,055.50 = 260,510.13/x
3. Step 3: Cross multiply
   478,300.59x = 660,055.50 × 260,510.13
4. Step 4: Simplify right side
   478,300.59x = 171,951,144,112.22
5. Step 5: Solve for x
   x = 171,951,144,112.22/478,300.59
6. Step 6: Final answer
   x = 359,504.35