Finding the Fourth Proportional to 78,612.93, 108,488.16 and 42,804.45

Step by Step Solution

1. Step 1: Write the proportion equation
   78,612.93 : 108,488.16 = 42,804.45 : x
2. Step 2: Convert to fraction form
   78,612.93/108,488.16 = 42,804.45/x
3. Step 3: Cross multiply
   78,612.93x = 108,488.16 × 42,804.45
4. Step 4: Simplify right side
   78,612.93x = 4,643,776,020.31
5. Step 5: Solve for x
   x = 4,643,776,020.31/78,612.93
6. Step 6: Final answer
   x = 59,071.40