Finding the Fourth Proportional to 77,573.76, 107,100.76 and 53,691.72

Step by Step Solution

1. Step 1: Write the proportion equation
   77,573.76 : 107,100.76 = 53,691.72 : x
2. Step 2: Convert to fraction form
   77,573.76/107,100.76 = 53,691.72/x
3. Step 3: Cross multiply
   77,573.76x = 107,100.76 × 53,691.72
4. Step 4: Simplify right side
   77,573.76x = 5,750,424,017.71
5. Step 5: Solve for x
   x = 5,750,424,017.71/77,573.76
6. Step 6: Final answer
   x = 74,128.47