Finding the Fourth Proportional to 144,293,991.98, 199,128,259.86 and 78,216,684.76

Step by Step Solution

1. Step 1: Write the proportion equation
   144,293,991.98 : 199,128,259.86 = 78,216,684.76 : x
2. Step 2: Convert to fraction form
   144,293,991.98/199,128,259.86 = 78,216,684.76/x
3. Step 3: Cross multiply
   144,293,991.98x = 199,128,259.86 × 78,216,684.76
4. Step 4: Simplify right side
   144,293,991.98x = 15,575,152,328,276,984
5. Step 5: Solve for x
   x = 15,575,152,328,276,984/144,293,991.98
6. Step 6: Final answer
   x = 107,940,407.74