Finding the Fourth Proportional to 139,909,543.52, 193,075,512.72 and 78,033,889.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,909,543.52 : 193,075,512.72 = 78,033,889.76 : x
2. Step 2: Convert to fraction form
   139,909,543.52/193,075,512.72 = 78,033,889.76/x
3. Step 3: Cross multiply
   139,909,543.52x = 193,075,512.72 × 78,033,889.76
4. Step 4: Simplify right side
   139,909,543.52x = 15,066,433,274,947,958
5. Step 5: Solve for x
   x = 15,066,433,274,947,958/139,909,543.52
6. Step 6: Final answer
   x = 107,686,958.99