Finding the Fourth Proportional to 288,061.60, 431,055.60 and 194,749.60

Step by Step Solution

1. Step 1: Write the proportion equation
   288,061.60 : 431,055.60 = 194,749.60 : x
2. Step 2: Convert to fraction form
   288,061.60/431,055.60 = 194,749.60/x
3. Step 3: Cross multiply
   288,061.60x = 431,055.60 × 194,749.60
4. Step 4: Simplify right side
   288,061.60x = 83,947,905,677.76
5. Step 5: Solve for x
   x = 83,947,905,677.76/288,061.60
6. Step 6: Final answer
   x = 291,423.45