Finding the Fourth Proportional to 78,585.01, 117,877.61 and 19,419.77

Step by Step Solution

1. Step 1: Write the proportion equation
   78,585.01 : 117,877.61 = 19,419.77 : x
2. Step 2: Convert to fraction form
   78,585.01/117,877.61 = 19,419.77/x
3. Step 3: Cross multiply
   78,585.01x = 117,877.61 × 19,419.77
4. Step 4: Simplify right side
   78,585.01x = 2,289,156,417.59
5. Step 5: Solve for x
   x = 2,289,156,417.59/78,585.01
6. Step 6: Final answer
   x = 29,129.68