Finding the Fourth Proportional to 78,376.91, 108,177.35 and 51,521.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,376.91 : 108,177.35 = 51,521.89 : x
2. Step 2: Convert to fraction form
   78,376.91/108,177.35 = 51,521.89/x
3. Step 3: Cross multiply
   78,376.91x = 108,177.35 × 51,521.89
4. Step 4: Simplify right side
   78,376.91x = 5,573,501,527.19
5. Step 5: Solve for x
   x = 5,573,501,527.19/78,376.91
6. Step 6: Final answer
   x = 71,111.52