Finding the Fourth Proportional to 78,779.73, 108,717.39 and 42,970.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,779.73 : 108,717.39 = 42,970.98 : x
2. Step 2: Convert to fraction form
   78,779.73/108,717.39 = 42,970.98/x
3. Step 3: Cross multiply
   78,779.73x = 108,717.39 × 42,970.98
4. Step 4: Simplify right side
   78,779.73x = 4,671,692,791.34
5. Step 5: Solve for x
   x = 4,671,692,791.34/78,779.73
6. Step 6: Final answer
   x = 59,300.70