Finding the Fourth Proportional to 139,019,726.80, 208,604,239.80 and 58,248,859.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,019,726.80 : 208,604,239.80 = 58,248,859.60 : x
2. Step 2: Convert to fraction form
   139,019,726.80/208,604,239.80 = 58,248,859.60/x
3. Step 3: Cross multiply
   139,019,726.80x = 208,604,239.80 × 58,248,859.60
4. Step 4: Simplify right side
   139,019,726.80x = 12,150,959,076,074,934
5. Step 5: Solve for x
   x = 12,150,959,076,074,934/139,019,726.80
6. Step 6: Final answer
   x = 87,404,567.36